2018 neco physics obj and essay answers

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Physics 2020 WAEC Past Questions

In collision between two objects, kinetic energy is conserved only if

• A. one of the objects was initially at rest
• B. potential energy is converted to work
• C. the collision is inelastic
• D. the collision is elastic

The quantity of motion of a body is its

• A. acceleration
• B. displacement
• D. velocity

The volume of a fixed mass of a gas varies inversely as the pressure on it provided the temperature is constant. This statement is

• A. Pressure law
• B. Charles law
• C. Boyle's law
• D. General gas law

An image formed on a screen is always?

• A. inverted
• B. magnified

How would the capacitance of a parallel plate capacitor be affected if the distance of separation of its plates is decreased? It will

• A. increase in value
• B. decrease slightly
• C. remain unchanged
• D. drop to zero
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Your #no 1 best website for waec runz | jamb cbt runz | neco runz | gce runz and school news, for easy & fast contact +2349068045697 || call 09068045697, 2018 waec gce physics obj & essay questions and answers (sure expo).

September 12, 2018 Mr Class Gce 0

2018 Waec GCE Physics OBJ & Essay Questions And Answers (Sure Expo)

Waec gce 2018 aug/sept answers.

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WAEC GCE 2018 physics practical ANSWERS FROM EXAMCLASS.NET –=-=-=-=-=-=-=-=-=-=-==-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

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100% VERIFIED  physics obj ANSWERS

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PHYSICS OBJ: Pls trace the answers in ur options 1. kilogram, meter and second 2. Vernier caliper 3. 4. gravitational force 5. Average velocity 6. ohm 7. slope of the lonear portion (AB).. 8. the adhesion between water and glass molecules is greater than the cohesion among the water molecules 9. 2.0 ms-2 10. u2/2g 11. Temperature 12. Temperature of the liquid 13. 0.5Ns 14. Screw jack 15. 4.69mm 16. Nm^2 Kg ^-2 17. Electric to heat 18. Temperature 19. 1000.oJ 20. Q will be less than pressure at R 21. 98.6 degreeF 22. Polarized 23. red 24. 25. 0.04m 26. elasticity 27. I and III only 28. 1/24cm 29. 30. real, magnified, inverted 31. 0.250ms^-1 32. sinusoidal 33. Low value resitor connected accross an AMMETER 34. 35. Increase in the distance btwn the plates 36. GHC 79.20 37. 0.5 height and 4.0m width 38. 400ms^-1 39. mechanical, heat and sound energy 40. doubling the inductance 41. 42. Longer and thinner 43. 44. 45. 6 ohms 46. Henri Becquerel 47. both energy and momentum 48. intensity at incident radiation 49. Have long wavelength

50. 1.02×10^-7

100% VERIFIED  PHYSICS THEORY ANSWERS

(1a) Young modulus of a material or the modulus of elasticity.

(1b) Potential Energy to kinetic Energy.

(2) e = 0.7m m=60 × 10^-3kg = 6.0×10^-2kg K = 200Nm^-1 W = 1/2ke² = 1/2mv² 1/2ke² = 1/2mv² V² = ke²/m = 200×0.7²/6.0×10^-2 V² = 98×10²/6 V² = 16.33×10² V = √1633 V = 40.4 Speed = 40.4ms^-1

(3) (i) Optical fibres have extremely high bandwidth (ii) They have longer transmission distance (iii) They have resistance to electromagnetic interference

(4a) It is used in geometric stations used to move a satellite from low earth orbit into a geostationary orbit.

(4b) Polar orbit satellite is used in earth mapping.

(5a) (i) Centripetal force (ii) Centrifugal force

(5b) Ft = mDv where F = force t = time Dv = change in velocity m = mass of object

Hence F = mDv/t

(6a) (i) It can cause short and long term sun burn effects. (ii)It can cause blindness when flashed to the eyes.

(6b) Energy = hf = 6.60×10^-34 × 4.82×10^14 = 3.18×10^-19J = 1.99ev

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(7) V = 2πR/T R = 9.6×10^6 + 6.4×10^6 =16×10^6 m T = 24hrs =(24×60×60)s V = 2×3.142×16×10^6/24×60×60 V = 1162.96m/s

8a) Mass is the amount of material contained in a body and the SI unit is Kg while Weight is the force exerted on a body by the gravity of the object. ..Mass is a scalar quantity( It has not specific direction), While Foce is a vector quantity (Its in the same direction with gravity)

8ai) Mass is measured in Kg Weight is measured in Newton Mass is a scalar quantity Weight is a vector quantity Mass is constant Weight varies

8aii) Clockwise moment about the pivot. Moment = Force x Distance Moment = 250 x 0.75 Moment = 187.5Nm

8bii) (the value of F) Clockwise moment = Anti clockwise moment Fx(1.5+0.75) + 50x 0.75 = 250 x 0.75 F x 2.25 + 37.5 = 187.5 2.25F = 187.5-37.5 2.25F= 150 F = 150/2.25 F= 170.83N

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(11a) Lenz’s law states that an induced current is in such direction that it’s magnetic effect opposes the change by which the current is induced.

(11b) (i) Magnets are used in construction of speakers. (ii) They are used to store data in computers. (iii) Used in magnetic resonance imaging machines.

(11ci) (a) Two coils: So as to produce an induced current from one coil to the other.

(b) an iron core: To increase the strength of the magnetic field.

(11d) Total resistance in series Rt = R1 + R2 = 500 + 400 Rt = 900ohms

Taking E = 6v E = V + ir E = VR + Ir E = I ( R + r) I = E/R + r taking r = 200ohms I = 6/900+200 I = 6/1100 I = 0.005A

Hence the voltmeter reading V = IR = 0.005 × 200 = 1.09v

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(12a) (i) Cosmic rays (ii) Rocks and soils

(12b) Because the mass of a radioactive isotope decreases exponentially. Also, the source and intensity of radiation differs.

(12c) (i) Dielectric materials (ii)

(12d) (i) Alpha radiation (ii) Beta radiation

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Genuine Exam Past Questions and Answers Online Bookshop – PDF and MS Word Download

NECO Physics Past Questions PDF Download [Free] – Objective, Theory, Practical

Are you writing the National Examination Council NECO internal/external exam, if yes you need the NECO Physics Past Questions

we at stcharlesedu.com has compiled a good number of NECO Physics Past Questions in pdf Physics Paper 2 – Theory/Essay Questions Physics Paper 3 – Objective Test Questions

Our research has confirm that candidate that uses National Examination Council Physics past questions to prepare for NECO is ten times better than those who do not.

Table of Contents

• 1.1 Physics Objective Questions for NECO Paper 3 III
• 2.1 Physics Theory Questions for NECO Paper 2 – Part 1 one
• 2.2 Physics NECO Theory Questions Paper 2 – Part 2 Two
• 3 Free Download Physics NECO Past Questions PDF
• 4 How to Get National Examination Council NECO Physics Past Questions

NECO Physics Objective Questions

Paper III will last for 1 hour, 15 minutes. Answer Paper III on your objective test answer sheet. On completion of Paper III, the objective test answer sheet will be collected. Answer all the questions. Each question is followed by five options A to E. Find out the correct option for each question and shade in pencil, on your answer sheet, The answer space which bears the same letter as the option you have chosen. Give only one answer to each question. An example is given below.

What others are downloading NECO Past Questions for all Subjects

Physics Objective Questions for NECO Paper 3 III

1.The frequency of a vibrating spring is 4Hz. Determine the time it will take to make 20 oscillations A. 0.2s B. 5.0s C. 16.0s D. 24.0s E. 80.0s

2. A stone is pulled along a horizontal plane by a constant force of 20N at an angle of 30° to the plane. Calculate the work done in moving the stone through a distance of 10m. A. 100.0 J B. 115.5 J C. 173.2 J D. 200.0 J E. 250.0 J

3. An effort of 66,25ON was applied through a distance of 32m, on a crane, to lift a container weighing 424,000N through a vertical height of 4m. What is the efficiency of the machine? A. 12.5% B. 21.5% C. 51.2% D. 64.0% E. 80.0%

4. Which of the following phenomenon is due to reflection of light A. A red surface appearing black when viewed under green light B. A stick appearing bent when partially immersed in water C. Formation of image D. Formation of shadow E. Production of glare

5. Which of the following pairs of objects are both luminous? A. Candle and sun B. Electric lamp and moon C. Glow-worms and torch light D. Star and candle E. Sun and fire-fly

6. An object is placed 15cm in front of a concave mirror of radius of curvature 20cm. Calculate the magnification of the image produced. A. 2.0 B. 2.5 C. 3.0 D. 4.5 E. 5.0

7. Two parallel metal plates separated by a distance of 5.0cm, are charged to a voltage of 20V. Calculate the electric field intensity between them. A. l.0Vm -1 B. 4.0Vm -1 C. 25.0Vm -1 D. l00.0Vm -1 E. 400.0Vm -1

10. A radioactive material has a half-life of 5 years. What is the fraction of the original radioactive nuclei that will be lost after 20 years? A.1/32 B. 1/16 C. 1/8 D. 7/8 E. 15/16

11. The proton and neutron numbers present in an atom represented by x y Ʌ A are____ respectively. A. X and X – Y B. X and X + Y C. Y and X D. Y and X-Y E. Y and X + Y

12. An atom moves from an energy level E 2 to a lower energy level E 1 . If h is the Planck’s constant, the expression for the frequency of the radiation in terms of the given parameters is A. h(E 1 -E 2 ). B. h(E 2 -E 1 ). C. h(E 2 -E 1 ) -1 D. (E 1 -E 2 ) h -1 E. (E 2 -E 1 ) h -1

13. Shiroro dam is an hydroelectric dam located in __State. A. Benue B. Borno C. Kogi D. Niger E. Sokoto

14. A gyroscope is a part of a satellite that A. aligns the satellite in its orbit. B. monitors weather condition. C. receives signals. D. reduces air resistance. E. stores energy.

15. The following are functions of Nigeria Sat-1, except A. agriculture. B. broadcasting. C. defense. D. environmental management. E. transportation.

16. Which of the following is not a condition for producing large e.m.f. in generator? A. Increasing the number of turns in the armature B. Increasing the speed of the armature C. Increasing the strength of the magnetic field D. Interchanging the polarity of the magnet E. Wounding the coil on a soft iron core

17. Electrical power is transmitted at high voltage and low current so as to A. increase the magnitude of the current. B. minimize energy losses. C. minimize the risk of transmission. D. reduce the cost of transmission. ; E. stabilize the power supply.

18. Which of the following machines is not used in the office? A. Perforator B. Photocopier C. Plier D. Scanner E. Stapler

19. A quantity of salt was added to a cup of cold water and left undisturbed. After sometime the mixture becomes a salt solution. This phenomenon is due to A. Brownian motion. B. capillarity. C. convection. D. diffusion. E. osmosis.

20. The electron of an atom I. moves in an orbit without -radiating energy. II. has an angular momentum that is quantize. III. has energy that cannot vary continuously.

Which of the above statement(s) is/are correct about Bohr’s model? A. I only B. II only C. III only D. I and II only E. I,II and III

NECO Physics Theory Past Questions

This paper consists of TWO parts: I and II. Answer TEN questions, SIX questions from Part I and FOUR questions from Part II. Write your answers in ink or blue/black biro in your answer booklet. Use of scientific calculators or mobile phones is not allowed. Paper II will last for 1 hour, 45 minutes.

Physics Theory Questions for NECO Paper 2 – Part 1 one

Answer six questions from this part: No.l and any other five. Question No.1 carries 5 marks while others carry 3 marks each.

1. (a) Name the basic materials needed for the construction of an electric motor. (b) Stale three uses of rockets. (c) Mention two applications of solar collectors.

2. A line RS of magnitude 10 units is specified by the coordinates R(6,4) and S(2,K), determine the positive value of K.

3. (a) What is trajectory? (b) State the parameters that determine the total time of flight of a projectile other than acceleration of free fall due to gravity.

4-10 removed/omitted

11. The wavelength of an electron λ e is expressed as h/m e V e

where h, m e and V e are the Planck’s constant, mass and velocity of the electron respectively. Express the kinetic energy of the electron in terms of the given parameters.

Physics NECO Theory Questions Paper 2 – Part 2 Two

Answer any four questions from this part. All questions carry equal marks.

12. (a) Mention the class of lever that each of the Following simple machines belongs to: (i) sugar tongs: (ii) nutcracker; (iii) pliers; (iv) bottle openers.

(b) (i) State Archimedes’ principle. (ii) Explain why an object feels lighter in water than in air.

(c) A mass of 500g is attached to a vertical spiral spring and set into vibration. If the force constant of the spring is 4Nm -1 . Calculate the

(i) period; (ii) frequency of the oscillation. [n = 3.14]

13. (a) State two differences between heat and temperature. (b) Draw and label a bimetallic strip, made of copper and iron, after heating.

(c) A bomb of mass 6.0kg explodes into many parts but only one-filth of its mass flies off in two directions. One part, which is of mass 0.8kg flies off with a velocity of 50ms-1 and the other with a velocity V flies off in the opposite direction. Calculate the (i) magnitude of V and (ii) total kinetic energy of the bomb.

14-16 omitted/removed

17. (a) (i) What is an artificial satellite? (ii) Mention one example of an artificial satellite other than Nigeria Sat-1

(b) (i) Draw a labelled diagram; (ii) explain the working principle of a step-up transformer.

(c) A slide projector gives an image of a square slide of side 20cm. If the image is a square of side 220cm and the slide is 8cm from the lens. Calculate the (i) image distance; (ii) focal length of the lens.

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Home » NECO » NECO Physics Answers 2023 (Essay/Obj) Questions Out

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Neco physics answers 2023 (essay/obj) questions out.

NECO Physics Answers for 2023 Questions Released.

The Neco physics answers 2023 for SSCE questions are now available for exam candidates. The National Examination Council (NECO) Senior School Certificate Examination (SSCE) Physics paper will be written on Thursday 27th July 2023.

The O’Level Neco physics questions below are for Paper III & II: Objective & Essay which will commence at 10.00 am and end by 1.00 pm. That means the examination will last for three hours. Continue reading.

NECO Physics Answers 2023 Questions.

1. (a) A stone projected horizontally from the top of a tower with a speed of 4 ms-1 lands on the level ground at a horizontal distance of 25 m from the foot of the tower. Calculate the height of the tower. [ g = 10 ms-2 ] (b) A spiral spring with a metal extends by 10.5cm in the air When the metal Is fully in water, the spring extends by 6.8 cm. Calculate the relative density of the metal (Assume Hooke s law Is obeyed)

2. (a) Explain diffusion. (b) Give one reason why the rate of diffusion is higher in gasses than in liquid at the same temperature.

3. (a) State two conditions under which photo-electrons can be emitted from the surface of a metal. (b) List two particles characteristics of electromagnetic waves. ANS: (a) Conditions for emission of photoelectrons – the wavelength of incident radiation must be less than the threshold wavelength of the metal surface. – the frequency of incident radiation must be greater than the threshold frequency. – the energy of the incident photons (radiation) must be greater than the Work function of the metal (b) Particle characteristics of electromagnetic waves; e.g – Photoelectric effect – Thermionic emission – Radiations from heated bodies (Black body) – Emission and absorption of light  (incandescence) – Compton effect.

4. (a) Explain how gas can be made to conduct electricity. (b) Name the electric charge carriers in gases. ANS: (a) The molecules /atoms of a gas must be ionized before the gas can conduct electricity. Ionization of the gas requires that the gas pressure is very low within the enclosure and a very high voltage is applied to the enclosed gas. (b) Charge carries in gases are Electrons; Ions

5. State; (a) two applications of electrolysis in an industry; (b) one application of electrolysis in a school laboratory.

6. (a) (i) What is an eclipse? (ii) List the three types of eclipse. (b) A student in a lecture theatre can read from the board clearly but requires a pair of spectacles to read from a book. (i) What eye defect has this student? (ii) What type of lens is needed to correct the eye defect? (iii) The focal length of the lens used to correct this defect is 10 cm. Calculate the power of the lens. (c) A car B moves towards a stationary car A.  If B produces an ultrasonic sound at a point and it takes 5.6 x 10-3  s for a beep to be heard in B, calculate the distance between the two cars at that instant. (Speed of sound in air = 340 ms-1) (d) The image of an object is located 9 cm behind a convex mirror.  If the magnification produced is 0.6, calculate the focal length of the mirror.

7. (a) (i) What is a vector quantity ? (ii) Three vectors 3 ms-1 N 45o W, 12 ms-1W, and 5ms-1 S act at a point. (iii) Sketch a vector diagram to illustrate the given information. (iv) Calculate the resultant of the vectors. (b) In a laboratory experiment to determine the force constant of a spiral spring, the mass on the spring was varied and the corresponding extensions were measured and recorded as shown in the table below.

(i) Copy and complete the table.  (Take g = 10ms-2 ) (ii) Plot a graph with weight, W, on the vertical axis and extension, e, on the horizontal axis. (iii) Using the graph, determine the force constant of the spring. (iv) Determine the natural length of the spring if its length was 38.0 cm when loaded with 250 g mass.

8. (a) Define heat capacity and state its unit. (b) List two effects of heat on a substance (c) Explain how a tightly fitted glass stopper could be removed from a reagent bottle. (d) A quantity of pepper soup of mass 800g poured into a plastic container with a tight fitting lid has a temperature of 30oC. The container is then placed in a microwave oven, rated 1200 W, and operated for 3 minutes. (i) Calculate the final temperature attained by the soup.  (Assuming no heat losses). (ii) Explain why containers with tight-fitting lids are not suitable for use in microwave cooking. (iii) When the soup is brought out and allowed to cool, a dent was observed on the container. Explain. [ Take specific heat capacity of the soup  =  4000 Jkg-1 K-1 ]

9. (a) State the three characteristics of sound and the factor on which each of them depends. (b) Explain resonance as applied to sound. (c) Explain why sound waves cannot be plane polarized. (d) What role does echo play in the construction of a concert hall? (e) The surface of an eardrum (assumed circular) has a radius 2.1 mm.  It resonates with an amplitude of 0.8 x 10-7 m as a result of impulses received from an external body vibrating at 2400 Hz. If the resulting pressure change on the eardrum is 3.6 x 10-5 Nm-2. Calculate the: (i) period of oscillation (ii) velocity (iii) acceleration (iv) force. [Pi =  3.14]

10. (a) Define electromotive force. (b) State: (i) the principle of operation of a potentiometer; (ii) two advantages that a potentiometer has over a voltmeter in measuring the potential difference. (c) (i) Sketch and label a diagram of a gold-leaf electroscope. (ii) Give one use of a gold-leaf electroscope. (d) (i) Explain the action of a magnetic relay: (ii) List two factors that determine the magnitude of an induced emf in a coil. (iii) A current of 5 A passes through a straight wire in a uniform magnetic field of flux density 2.0 x 10-3 T.  Calculate the force per unit length exerted on the wire when it is inclined at 30o to the field.

11. (a) Write Einstein’s photoelectric equation and identity each component of the equation.

(b) For a photocell, state one factor each that is responsible for the: emission; r ate of emission; energy of photoelectrons.

(c) (i) Two nuclear equations are given below: +    ……………………..equation A +    ……………………..equation B Determine the values of: (p and q in equation A; (β)   m  and n in equation B and identify X. (ii) Give a reason why it is important to dispose of radioactive waste safety. (d) (i) A certain atom emits ultra-violet photon of wavelength 2.4 x 10-7m Calculate the energy of the photons

(i) – 6.0 x 10-19J

(ii) -8.2 x 10-19J -8.8 x 10-19J -1 6.7 x 10-19J

[h  =  6.6 x 10-34 Js;  c = 3.0x 108 ms-1]

Neco Physics 2023 Objective Questions.

Note:   There is nothing like Neco Physics Expo 2022 online. Neco Ssce candidates are to desist from patronizing online fraudsters/vendors who say they can provide such services as they are not real.

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NECO 2018 FOOD & NUTRITION THEORY AND OBJ QUESTIONS AND ANSWERS/ GET YOUR NECO FOOD & NUT QUESTIONS AND ANSWERS HERE

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• Post published: June 27, 2018
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WHAT NECO STANDS FOR

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NECO 2018 FOOD & NUTRITION THEORY AND OBJ QUESTIONS AND ANSWERS/ GET YOUR NECO FOOD & NUT QUESTIONS AND ANSWERS HERE

Neco results & higher school admission, neco june/july 2018  foods and nutrition obj answer.

READ OTHER   NECO 2018 QUESTIONS AND ANSWERS HERE :

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(1a) SPECIMEN A – Knapsack sprayer SPECIMEN B – Hand fork SPECIMEN C – Head pan SPECIMEN D – Ranging pole

(1b) (i) To get rid of leftover chemicals (ii) To aid the easy flowing of the chemicals from the nozzle (iii) To prevent it from rusting

(1c) (i) Pulverizing the soil (ii) Aerating the surface of the soil (iii) Transplanting of seedlings

(1d) (i) Metal surface (ii) Metal handle (iii) Hollow surface for loading

(1e) (i) Store in a cool dry place (ii) Clean thoroughly after use

========================================

(2a) E-It is a wood ash F-It is a urea fertilizer

(2b) E-Lime material/potash F-Nitrogen

(2c) Specimen E (i)Lime (ii)Quick lime (iii)Potassium

Specimen F (i)N.P.K fertilizer (ii)Nitrate fertilizer (iii)Manure

(2d) (i)It is used to improve sandy soil (ii)It is used to reduce or neutralize soil acidity

(2e) (i)It may increase soil acidity (ii)It can cause damage to plant (iii)It can increase soil salinity

================================================

(3a) SPECIMEN G – Cowpea seeds SPECIMEN H – Banana fruit

(3b) Grain weevils

(3c) G – Leguminous crop H – Fruit

(3d) G – Sexual propagation H – Asexual propagation

(3e) Specimen G (i) Vigna unguiculata (ii) Cercospora leaf spot

Specimen H (i) mycosphaerella leaf spot (ii) Black sigatoka

(3d) Specimen G (i) Drying (ii) Storing

Specimen H (i) Packing (ii) Storing

============================================

(4a) I-Poultry droppings J-Tilapia fish

(4b) (i)It can cause algae boom (ii)It prevents the penetration of lights into the water body (iii)It can reduce the oxygen content (iv)It causes pollution of the water body

(4c) (i)It can increase the soil nutrients/organisms (ii)It is used to feed livestocks eg cattles (iii)It is used to replenish lost soil nutrients

(4d) (i)Improper refuse/sewage disposal (ii)Dumping of contaminated items

(4e) (i)Source of food to the farm animals (ii)It improves soil nutrients (iii)For production of fertilizers

(4f) (i)Regular changing of water (ii)Regular sanitation (iii)Avoidance of feeding the fishes with high proteinous feeds (iv)Regular/Early harvesting

(4g) (i)Smoking (ii)Salting (iii)Drying (iv)Refrigerating

(1a) Centre of gravity C G = 50.0cm

(1aviii) Tabulate: Under Y(cm): 10; 15; 20; 25; 30; Under K(cm): 31.2; 33.5; 36.0; 38.2; 40.6; Under X(cm): 21.2; 18.5; 16.0; 13.2; 10.6; Under K¹(cm): 27.0; 29.7; 33.0; 35.5; 38.4; Under X¹(cm): 17.0; 14.7; 13.0; 10.5; 8.4;

(1axii) (i)i avoided drought by closing the window (ii)i avoided error due to parallax when reading the meter rule

(1bi) Couple is a pair of forces, equal in magnitude, oppositely directed, and displaced by perpendicular distance or moment.

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(3av) E=3.0v

(3avii) Tabulate

Under L(cm): 20.0; 30.0; 40.0; 50.0; 60.0; 70.0; Under I(A): 0.70; 0.60; 0.55; 0.50; 0.45; 0.40; Under X=E/I(Ohms): 4.2857; 5.0000; 5.4545; 6.0000; 6.6667; 7.5000;

(3aix) slope = ΔL/ΔX = 66 – 12/7 – 4 = 54/3 = 18cm

Intercept, C

(3ax) K = 4.9×10^-7 K = 4.9×10^-7 × 18 K = 8.82×10^-6cm/ohm

(3axi) -I ensured tight connections. -I avoided error due to parallax on the ammeter.

(3bi) keep the top or terminals clean. Do not tighten or remove cables while charging or discharging.

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NECO Physics Questions and Answers 2023/2024 | Essay and Objective

NECO   Physics Questions and Answers 2023. I will be showing you the NECO Physics objective and theory answers as well as repeated questions for free in this post. You will also understand how NECO Physics questions are set and how to answer them.

The National Examinations Council (NECO) is an examination body in Nigeria that conducts the Senior Secondary Certificate Examination and the General Certificate in Education in June/July and December/January respectively.

Table of Contents

NECO Physics Objectives And Essay Answers 2023 (Expo)

The 2023 NECO Physics expo will be posted here today 27th July during the NECO Physics examination. Keep checking and reloading this page for the answers.

NECO 2023 Physics Answers Loading.. .

NECO Physics OBJ Answers: The Answers will soon be posted here. Be patient we are solving.

1-10: EADCAEBEBC

11-20: ECDDCDBCCB

21-30: CECBEADCBB

31-40: BADDCDCAAA

41-50: EDACDCACAA

51-60: CEBACCBCAC

Essay Answers:

(i) Solar water heaters: These are devices that use solar collectors to absorb energy from the sun and heat water for domestic or industrial use.

(ii) Solar air heaters: These are devices that use solar collectors to absorb energy from the sun and heat air for space heating or ventilation purposes.

Total Magnification = Magnification of Objective Lens × Magnification of Eyepiece Lens.

Total Magnification = 10

Magnification of Objective Lens = 2

Let “E” represent the magnification of the eyepiece lens.

Static friction is a type of friction that exists between two surfaces in contact with each other when they are not moving relative to each other.

Coefficient of static friction (μs) = Force of static friction/ Normal force

Force of static friction = 3N

Normal force = 5N

μs = 3N / 5N = 0.6

The velocity ratio of a machine is the ratio of the distance moved by the effort to the distance moved by the load. It is a measure of the effectiveness of a machine in transmitting force.

Velocity ratio = distance moved by effort / distance moved by load

A second order lever has the load in the middle, with the effort applied on one side and the fulcrum on the other. The effort arm is longer than the load arm, which means the machine has a mechanical advantage. Examples of second order levers include wheelbarrows and nutcrackers WHILE A third order lever has the effort applied on one end, the load on the other end, and the fulcrum in between. The load arm is longer than the effort arm, which means the machine has a mechanical disadvantage. Examples of third order levers include tweezers and shovels.

Q4&5????

– Angle of incidence (θ₁) = 60°

– Speed of light in air = 3×10⁸ m/s

– Speed of light in glass = 2×10⁸ m/s

The refractive index (n) of a medium can be calculated using the formula:

n = speed of light in vacuum / speed of light in the medium

Refractive index of air (n₁):

n₁ = speed of light in vacuum / speed of light in air

n₁ = 3×10⁸ m/s / 3×10⁸ m/s

Refractive index of glass (n₂):

n₂ = speed of light in vacuum / speed of light in glass

n₂ = 3×10⁸ m/s / 2×10⁸ m/s

Using Snell’s law to find the angle of refraction (θ₂):

n₁ × sin(θ₁) = n₂ × sin(θ₂)

1 × sin(60°) = 1.5 × sin(θ₂)

sin(θ₂) = (1 × sin(60°)) / 1.5

sin(θ₂) = sin(60°) / 1.5

θ₂ = arcsin(sin(60°) / 1.5)

θ₂ ≈ arcsin(0.86602540378 / 1.5)

θ₂ ≈ arcsin(0.57735026919)

θ₂ ≈ 35.26°

(i) Electric motors: Electromagnets are used in electric motors to convert electrical energy into mechanical energy. An electric motor contains an armature with a coil of wire that rotates within a magnetic field created by an electromagnet.

(ii) Magnetic resonance imaging (MRI): Electromagnets are used in MRI machines to create a strong magnetic field that aligns the protons in the body’s tissues. Radio waves are then used to create images of the body’s internal structures.

The soft iron bar can be converted to a magnet by placing it in contact with a bar magnet. When the bar magnet is brought close to the soft iron bar, the magnetic domains in the soft iron bar become aligned with the magnetic field of the bar magnet. This causes the soft iron bar to become magnetized and it will now be able to attract other magnetic materials.

Reactance refers to the opposition that an electrical circuit or component exhibits to the flow of alternating current (AC). It is a fundamental concept in understanding AC circuits and is closely related to the concept of impedance.

Xc = 1/(2πfC)

Xc = Capacitive reactance in ohms (Ω)

π = 3.14 (approximate value)

f = Frequency in Hertz (Hz)

C = Capacitance in Farads (F)

Capacitive reactance (Xc) = 3000Ω

Capacitance (C) = 5µF = 5 * 10-⁶F

Rearranging the formula to solve for frequency (f):

f = 1/(2*π* Xc* C)

Substituting the given values:

f = 1/(2 * 3.14 * 3000 * 5 * 10-⁶ )

f = 1/(2 * 3.14 * 3000 * 0.000005)

f = 1/(6.28 * 0.015)

f = 1/0.0942

f=10.62Hz (approx. 2 decimal).

Photoelectrons are electrons that are emitted from a material when it absorbs electromagnetic radiation, typically in the form of photons (light). This phenomenon is known as the photoelectric effect.

Formula for threshold frequency;

F= Frequency

E = Work function(Energy)

h= Plank’s constant (6.6×10-³⁴)

Converting the work function to joules:

Work function (ϕ) = 3.5 eV = 3.5 × 1.6 × 10-¹⁹ J = 5.6 × 10-¹⁹ J

Substituting the values

F= 5.6 × 10-¹⁹/6.6×10-³⁴

F= 8.48×10¹⁴Hz

(i) Radiation exposure: X-rays are a type of ionizing radiation, which means that they can damage the DNA in cells and increase the risk of cancer. Exposure to high doses of X-rays can also cause radiation sickness, which can lead to nausea, vomiting, and hair loss.

(ii) Skin burns: X-rays can cause skin burns if the skin is exposed to a high dose of radiation. The severity of the burn depends on the dose of radiation and the duration of exposure.

(i) Soft X-rays have lower energy levels, while hard X-rays have higher energy level

(ii) Soft X-rays are commonly used in scientific research, such as studying atomic structures and electronic properties while Hard X-rays are more prevalent in medical and industrial applications, like diagnosing fractures, inspecting welds, or examining luggage at airports for security purposes.

(iii) Soft X-rays are more easily absorbed by matter than hard X-rays. As a result, softer X-rays are used to examine lighter elements, while harder X-rays are preferred for studying heavier elements in samples.

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See: NECO Civic Education Answers

NECO Physics Questions and Answers For Practice

The questions below are the NECO 2022 Physics Practice Questions. Go through them and be ready to score high in your NECO 2022 Physics Examination.

1. The equation X 150 62  => Y 150  63  + -1 + energy, represents

A. Alpha decay

B. Beta-decay

C. Gamma decay

D. Photon emission

ANSWER: B (Beta-decay)

2. The ice and steam points of a thermometer are 20mm and 100mm respectively. A temperature of 75 degree Celsius corresponds to Y mm on the thermometer. What is Y?

ANSWER: C (80mm)

3. When a yellow card is observed through a blue glass, the card would appear as

ANSWER: A (Black)

4. In a nuclear plant, the final mass of the products is 6.32×10^-27kg, while the initial mass of the reactant is 6.30×10^-27kg, the energy released in the process is (speed of light in vacuum 3.0×10^8m/s, 1eV = 1.6×10^-19J)

A. 11.25meV

B. 11.25 MJ

D. 12.25meV

ANSWER: A (11.25meV)

5. A 1.5kg stone was thrown vertically upward with an initial velocity of 42m/s, What is the potential energy of the stone at the highest point reached.

6. When two objects P and Q are supplied with the same quantity of heat, the temperature change in p is observed to be twice that of Q. The mass of P is half that of Q. The ratio of the specific heat of P to Q is

ANSWER: C (1:1)

7. The following statements were made by some students describing what happened during the determination of the melting point of solids

1. The temperature of the solid was constant until melting started

2. The temperature of the solid rose until melting started

3. During melting, the temperature was rising

4. During melting, the temperature was constant

5. The temperature continued to rise after all the solid had melted.

6. The temperature stopped rising after all the solid had melted. Which of the following gives correct statements in the right order?

A. 2, 4 and 5

B. 2, 3 and 6

C. 1, 3 and 6

D. 1, 3 and 5

ANSWER: A (2, 4, and 5)

8. A silver spoon and a wooden spoon are both at room temperature. The silver spoon is cooler to touch because silver

A. has a greater density

B. can be polished

C. is a less absorbent material than wood

D. is a better conductor of heat

ANSWER: D (is a better conductor of heat)

See: NECO Timetable

NECO Physics Essay Questions

1. (a) A student makes a model of an atom. The model contains 24 electrons, 25 protons and 26 neutrons. Some of these particles are inside a nucleus at the centre of the model. (i) Determine the nucleon number (mass number) of the atom. (ii) Explain why the model represents a charged atom. (iii) The student makes a new model of a different isotope of the same element. Describe the nucleus of this new model.

Ans:  1 (a) (i) 51 B1 (ii) more protons than electrons or different number of protons and electrons positive and negative do not cancel. (iii) 25 protons. a different number of neutrons.

2. Fig. 1.1 shows the distance-time graph for two cyclists A and B. They start a 500 m race together but finish the race at different times.

(a) Use Fig. 1.1 to determine (i) the distance between A and B at time t = 20s, (ii) the difference in the time taken by A and B for the race.

(b) Cyclist C starts the race at the same time as A and B and covers the first 200m of the race at a constant speed of 5.0 m/s. He then accelerates and finishes the race at t = 60s. (i) On Fig. 1.1, draw the distance-time graph for cyclist C. (ii) Calculate the average speed of cyclist C for the whole race.

Ans:  (a) (i) 60 m (ii) 12s (b) (i) straight line from origin to 200 m at 40s any line straight or curved from (40,200) to (60,500) (ii) s = d/t or 500/60 = 8.3m/s

Neco Physics Objective Sample Questions;

If a satellite travels at a constant speed round the earth in a circular orbit,

1. Which of the quantities in the list below are scalars. (a) acceleration (b) force (c) mass (e) speed.

2. The velocity of the satellite changes, but its speed is constant. State what is meant by velocity…………………….

3. Explain why the velocity changes……………………………

4. Explain what makes this satellite move in an orbit that is circular

Have a Target and Work Towards Actualizing it 

You have decided to pass NECO Physics 2023 and I am sure of that. Now, the next thing you should do is set targets.

You have told yourself, “I will score A in Neco Physics 2023”, that’s not all. You need to plan on how to make it happen. Create a timetable and master plan to achieve your goals.

Get the Recommended Textbook on Physics  for 2023 NECO Examination

Normally, NECO recommends books for the examination. But apart from NECO English Literature where certain novels are compulsory, you are free to use any good English Language textbook to prepare for NECO 2023 exam.

Some textbooks are more difficult to understand. If you have any topic you are finding difficult to understand, then get a textbook that will simplify the topics and make life better for you.

 Do not Skip Physics Examples and Exercise you Will Come Across While Reading: 

Many candidates are fond of skipping exercises and even examples while studying textbooks. In fact, we like notebooks so much that we could ask, “can I read my notebook and pass NECO Physics 2023?” Don’t be scared of attempting exercises in Biology. Face the challenges.

Note: The above questions are likely NECO Physics Questions and Answers, not the real questions

If you have any questions about the  NECO Physics Questions and Answers 2023 , kindly drop your question in the comment box.

Last Updated on July 27, 2023 by Admin

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126 thoughts on “NECO Physics Questions and Answers 2023/2024 | Essay and Objective”

Please sir I need today answer

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Thanks alot pls put the one foe chemistry

Pls sir I need today physics answers

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WAEC NECO JAMB GCE AND NABTEB QUESTIONS AND ANSWERS.

Neco 2018 expo general mathematics objective & essay questions and answers.

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