Reading:

Cutnell and Johnson, Chapter 19.

Problems for Review:

Reviewing these problems gives you good exposure to this week's main topics, in practice. All are worked in the Student Study Guide [SSG] or Student Solutions Manual [SSM]; solutions are posted on our website http://www.physics.emory.edu/Classes/142-003.html , for those without these texts.

Conceptual:

MCAT review problem, [SSG] p 366.

Quantitative:

Chapter 19, problems 1, 5, 13, 21, 33, 37, 45, 57.

Problems to Hand In:

Conceptual:

Use the following to answer questions 1--8:

The sketch below shows cross sections of equipotential surfaces between two charged conductors that are shown in solid black. Various points on the equipotential surfaces near the conductors are labeled A, B, C, , I.

1. At which of the labeled points will the electric field have the greatest magnitude?
   1. G
   2. I
   3. A
   4. H
   5. D
2. At which of the points will an electron have the greatest potential energy?
   1. A
   2. D
   3. G
   4. H
   5. I
3. What is the potential difference between points B and E?
   1. 10 V
   2. 30 V
   3. 40 V
   4. 50 V
   5. 60 V
4. What is the direction of the electric field at B?
   1. toward A
   2. toward D
   3. toward C
   4. into the page
   5. up and out of the page
5. How much work is required to move a charge from A to E?
   1. 
   2. 
   3. 
   4. 
   5. zero
6. How much work is required to move a charge from B to D to C?
   1. 
   2. 
   3. 
   4. 
   5. zero
7. A positive point charge is placed at F. Complete the following statement: When it is released,
   1. no force will be exerted on it.
   2. a force will cause it to move toward E.
   3. a force will cause it to move toward G.
   4. a force will cause it to move away from E.
   5. it would subsequently lose kinetic energy.
8. What is the magnitude of the electric field at point A?
   1. 10 V/m
   2. 25 V/m
   3. 30 V/m
   4. 75 V/m
   5. 100 V/m

Quantitative:

Chapter 19, problems 4, 14, 18, 35, 44, 46, 58, 62.

• About this document ...