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Department of Physics & Astronomy
Bucknell University
Lecture 1: Electric Charges, Forces, and Fields
January 16, 2024
Reading Assignment
- Read: Chapter 20, through most of page 378 (up until “Continuous Charge Distributions”)
- Study: Eqs 20.1, 20.2a, 20.2b, 20.3; Exs 20.2, 20.4, and 20.5
- (Continuing objective) Describe applications of the concepts of electricity and magnetism to everyday “real-life” situations.
- Use Coulomb's Law to calculate electric forces. Specifically, for a given configuration of a small number of point charges, calculate the total electric force (magnitude and direction) acting on any chosen charge, due to all the others.
- For a point charge or a configuration of several point charges, calculate the electric field (magnitude and direction) at any given location.
- Relate the electric force on a charge to the electric field at the location of the charge.
- Describe the physical difference between conductors and insulators.
- Show (using sketches) how the proximity of a charged object causes redistribution of charge in a nearby object. Explain how this can result in attractive forces.
Lecture Materials
Videos of example problems, pre-class entertainment, assigned problems guide.
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3: Electrostatics - Charges, Forces and Fields
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- Page ID 76510
- 3.1: Electrical Charge
- 3.2: Conductors, Insulators, and Charging by Induction
- 3.3: Coulomb's Law
- 3.4: Electric Field
- 3.5: Calculating Electric Fields of Charge Distributions
- 3.6: Electric Flux
- 3.7: Gauss’s Law
- 3.8: Applying Gauss’s Law
- 3.9: Conductors in Electrostatic Equilibrium
- 3.10: Summary
- 3.11: Practice
- 3.12: Electric Charges and Fields (Answer)
Thumbnail: The eight source charges each apply a force on the single test charge Q. Each force can be calculated independently of the other seven forces. This is the essence of the superposition principle.
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Lab 1: Electric Charge, Electric Field and Electric potential In this lab you will use the Charges and Fields PhET Interactive Simulations lab to study the electric field and electric potential in the space surrounding one or more point charges. The Electric Field and Electric Potential Created by a Point Charge A. Click on the "Grid" button.
2. Two like charges are separated by some distance. Describe quantitatively what will happen to the force exerted by one charge on the other if The distance between the charges is doubled a· b. The distance between the charges is halved One of the charges is replaced by a charge of the same magnitude but opposite sign c. Charge q2 is 2.5 × 10 ...
Question: Name PRE-LAB PREPARATION SHEET FOR LAB 1-ELECTRIC CHARGES, FORCES, AND FIELDS Due at the beginming of lab) Directions Read over Lab 1 and then answer the following questions about the procedures 1. Describe briefly what types of observations you will make in Activity 1-1 to determine whether like or unlike charges attract each other 2 ...
Date Partners HOMEWORK FOR LAB 1 ELECTRIC CHARGES, FORCES AND FIELDS 1. You have two charged pieces of Scotch Magic tape. How would you deter- mine if they have like or unlike charges? ... F-myg Find the magnitude and direction of the electric field at the position of qs pro- duced by 4 4. LAB 1: ELECTRIC CHARGES, FORCES, AND FIELDS 17 point ...
The x -components of the electric field at y = 3m cancel. The y -components give E(y = 3m) = 2.83 × 103N / C. At the origin we have a a negative charge of magnitide q = − 2.83 × 10 − 6C. 81. →E(z) = 3.6 × 104Nˆk. 83. dE = 1 4πε0 λdx (x + a)2, E = λ 4πε0[ 1 l + a − 1 a] 85. σ = 0.02C / m2 E = 2.26 × 109N / C. 87.
89. Charge is distributed along the entire x -axis with uniform density λx and along the entire y -axis with uniform density λy. Calculate the resulting electric field at. (a) →r = aˆi + bˆj and. (b) →r = cˆk. 90. A rod bent into the arc of a circle subtends an angle 2θ at the center P of the circle (see below).
Lab Information. Pooled Office Hours. ... Next> Lecture 1: Electric Charges, Forces, and Fields. January 16, 2024. Reading Assignment. Read: Chapter 20, through most of page 378 (up until "Continuous Charge Distributions") Study: Eqs 20.1 ... Explain how this can result in attractive forces. Homework. Wednesday's Assigned Problems: A2, A4 ...
Lab 1: Electric Charge, Electric Field and Electric potential In this lab you will use the Charges and Fields PhET lab to study the electric field and electric potential in the space surrounding one or more point charges. The Electric Field and Electric Potential Created by a Dipole Click on the "Grid" button. Pick the +1nC and the -1nC ...
electric charge. physical property of an object that causes it to be attracted toward or repelled from another charged object; each charged object generates and is influenced by a force called an electric force. electric field. physical phenomenon created by a charge; it "transmits" a force between a two charges. electric force.
PHYS 259, Lab 1, Winter 2021 2 Superposition of electric forces in one dimension Question 15: The gure shows four con gurations of three charges in one dimension. For each con gura-tion, draw the forces acting on the middle charge, then use a di erent colour to draw the net force on the middle charge. Note: the relative magnitudes must be ...
We recommend using the latest version of Chrome, Firefox, Safari, or Edge. Arrange positive and negative charges in space and view the resulting electric field and electrostatic potential. Plot equipotential lines and discover their relationship to the electric field. Create models of dipoles, capacitors, and more!
An electric force is dependent on the sign and strength of its electric charges. Net charge is conserved, and charge cannot be created nor destroyed but simply adjusted. ... Lab 5: Magnetic Fields Lab Report; Lab 1: Electric Charges, Potentials, and Fields Lab Report; Related documents. Lab 2: Electronic Primers Lab Report; Lab 3: Ohm's Law Lab ...
1. A neutral sphere has an equal number of positive and negative charges. 2. Electrons redistribute when a charged rod is brought close. 3. Some electrons leave the grounded sphere through ground wire and there is an excess pos charge. 4. the remaining electrons distribute themselves uniformly and there is a net positive charge on the sphere's ...
Each force can be calculated independently of the other seven forces. This is the essence of the superposition principle. This page titled 3: Electrostatics - Charges, Forces and Fields is shared under a CC BY 4.0 license and was authored, remixed, and/or curated by OpenStax via source content that was edited to the style and standards of the ...
ELECTRIC FIELDS AND FORCES Lab I - 1 The most fundamental forces are characterized as "action -at-a-distance". This means that an object can exert a force on another object that is not in contact with it. You have already learned about the gravitational force, which is of this type. You are now learning the electric force, which is another one.
1 Lab 2: Electric Fields - Coulomb Force at a Distance Introduction The Coulomb force, Fc, between two charges is determined by their magnitude, q1 and q2, and position, r. The concept of an electric field E=Fc/q= C Q/r2, similar to a gravitational field g= 9.8 m/s = GM/r e 2, is helpful in solving problems involving complex, real world charge
Describe quantitatively what will happen to the force exerted by one charge on the other if The distance between the charges is doubled a. b· The distance between the charges is halved c. One of the charges is replaced by a charge of the same magnitude but opposite sign Charge q2 is 2.5 × 10-9 C and charge qi has mass 0.20 g.
Lab 1 Electric Forces and Electric Fields Simulation Lab. Worksheet Problem 5. 5a. The magnitude of the net electric force on the +q charge in Case A [ Select ] ["<", ">", "="] the net electric force on the +q charge in Case B. Lab 1 Electric Forces and Electric Fields Simulation Lab. Worksheet Problem 5. 5b. The magnitude of the net electric ...
Charge q2 is 2.5 X 10 C and charge q has mass 0.20 g. The separation is 5.0 cm, and the angle 0 is 15 degree. Find 9ı (magnitude and sign). 9: 2 Form19 4. Find the magnitude and direction of the electric field at the position of q. pro- duced by 92. LAB 1: ELECTRIC CHARGES, FORCES, AND FIELDS
Name Date PRE-LAB PREPARATION SHEET FOR LAB 1-ELECTRIC CHARGES, FORCES, AND FIELDS (Due at the beginning of lab) Directions: Read over Lab 1 and then answer the following questions about the procedures. 1. Describe briefly what types of observations you will make in Activity 1-1 to determine whether like or unlike charges attract each other. 2.