# PC212 Electricity and Magnetism Tutorials

Pages created and updated by Terry Sturtevant Date Posted: May 12, 2017

Textbook Student companion site (9th edition)

Textbook Student companion site (8th edition)

On this page are links to my solutions as well as solutions provided by the publisher for selected problems.

# Tips

1. Draw picture.
2. Use colour.
3. See what you can figure out before math.
Some problems with multiple parts include a few which can be answered without math.
4. Use math.
5. Check.

# Chapter 24

• Key Ideas:
1. Positive electrical potential is like a "hill" for positive charges; i.e. they will run down.
Negative charges will run up.
2. Calculating potential can be done by a scalar integral or a path integral of the field.
One way will usually be much easier than the other.
3. The electric field points in the direction of steepest drop of electrical potential; i.e. it is the negative of the gradient of the potential.
4. Work done in moving a charge is the charge times its change in potential.

• Checkpoints:
1. Checkpoint 1 (9th edition)
2. Checkpoint 2 (9th edition)
3. Checkpoint 3 (9th edition)
4. Checkpoint 4 (9th edition)
5. Checkpoint 5 (9th edition)
6. Checkpoint 6 (9th edition)

• Chapter 24 resources (9th edition) (publisher links to all)
Chapter 24 resources (8th edition) (publisher links to all)

• Student Solutions manual for this chapter from the 9th edition (publisher) (Microsoft Word format)
problems 31, 43, 63 (9th edition)
problems 29, 41, 65 (8th edition)
• Student Solutions manual for this chapter from the 8th edition (publisher) (need to be unzipped; PDF format)
problems 31, 43, 63 (9th edition)
problems 29, 41, 65 (8th edition)
• (publisher) Interactive Learning Ware (9th edition)
• Problem 9 (9th edition)
Problem 7 (8th edition)
Problem 7 (7th edition)
• Problem 11 (9th edition)
Problem 11 (8th edition)
Problem 9 (7th edition)
• Problem 23 (9th edition)
Problem 25 (8th edition)
Problem 21 (7th edition)
• Problem 25 (9th edition)
Problem 23 (8th edition)
Problem 23 (7th edition)
• Problem 29 (9th edition)
Problem 27 (8th edition)
Problem 24 (7th edition)
• Problem 33 (9th edition)
Problem 33 (8th edition)
Problem 29 (7th edition)

[screencast of PDF]

• Problem 35 (9th edition)
Problem 35 (8th edition)
Problem 31 (7th edition)
• Problem 37 (9th edition)
Problem 39 (8th edition)
Problem 33 (7th edition)
• Problem 51 (9th edition)
Problem 45 (8th edition)
Problem 41 (7th edition)
• Problem 55 (9th edition)
Problem 57 (8th edition)
Problem 47 (7th edition)
• Problem 95 (9th edition)
Problem 93 (8th edition)
Problem 101 (7th edition)

# Chapter 31

## Resources

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Go to the main page for the Department of Physics and Computer Science.

Wilfrid Laurier University