Solve the following problems on your own paper. Please:

• Show all work.
• Put a box around your final answer to each problem.
• Be sure proper significant figures (SF) used for all answers.
• Separate all solutions with a horizontal line on your paper.
• A random selection of four problems will be graded for 25 points each.
• Solutions for suggested odd problems can be seen by following links.
• Solutions for assigned problems will be linked from this page after the due date.

Chapter 20

#6

Assume the magnetic field is uniform throughout the solenoid. Answer with 3 SF.

#10

Assume the area reduces to zero in the final state.

#14

Answer with either "into the page" or "out of the page" and justify the answer with your reasoning. Problem 15 and 16 are similar.

#18

Assume the magnetic field is uniform, like with #6.

#24 #24 (cont)

The positive end will be in the direction of the magnetic force felt by the positive charges in the conductor.

#30

Use equation 20.4 here.

#32

Use equation 20.7. Note that the maximum field occurs when the sin (theta) function is +/- 1. So that means the maximum is just the amplitude term that multiplies the sin (theta) function, or NBA(omega).

#34

The biggest EMF occurs when the flux changes the fastest. The flux depends on cos(theta). Look at a graph of cos(theta) from 0 to 360 degrees and ask when it changes fastest (when is the slope of the graph largest)?

#42

Use equation 20.10 for part (b).

#46

Answer with 2 SF. Remember that the loop rule applies just like with RC circuits.

Suggested problems from chapter 20:

C1, C2, C3, C4, C5, C6, C7, C8, C9, C10, C11, C12, C13, #1, #2, #3, #4, #5, #7, #8, #9, #11, #12, #13, #15, #16, #17, #19, #20, #21, #23, #25, #26, #27, #28, #31, #33, #35, #36a #36b, #37, #38, #39, #40, #41, #43, #44, #45a #45b, #47, #48, #49, #50, #51, #53, #54, #55a #55b, #56, #57a #57b, #59, #62, #63a #63b, #66a #66b