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

The magnetic field of a solenoid is given by Equation 19.15.

#10

Be sure to work in mks units. Also answer: In what direction will the induced current flow: clockwise (cw) or counterclockwise (ccw)?

#12

Answer with 3 SF.

#16

When the loop flips 180 degrees, remember that the change in the cosine term is 2, not 1.

#20

It would help to draw yourself a simple diagram in order to determine if the east or west end of the rod is positive.

#36

Treat the cord as a solenoid. Use the result of example 20.7.

#40

Use equations 20.9 and 20.10 here.

#44

Answer with 2 SF.

#46

Answer with 3 SF.

#48

Use the result of example 20.7 and equation 20.14 here.

#50

You can leave R and L as unknowns and express your answer in terms of R and L. Or you can assume that the value of R = 1 and L = 1 and just answer numerically.

Suggested problems for chapter 20:

C1, C2, C3, C4, C5, C6, C7, C8, C10, C12, #1, #2, #3, #4, #5, #7, #8, #9, #11, #13, #14, #15, #17, #18, #19, #21, #23, #24, #25, #27, #37, #38, #39, #40, #41, #42, #43, #45, #47, #49