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 19

#2 #2 (cont)

Just do part (a)

#8

The maximum and minimum values for the force refer to the sin function. The maximum and minimum values for sin(theta) are 1 and 0, respectively.

#18

In part (a), the angle between v and B is 90 degrees since B is in the N-S plane and v points East. In part (b), the angle is 165 degrees. Don't neglect to indicate direction in your answer.

#20

Assume only two forces are present here, gravity and magnetic. See problem 21 also.

#26

You need the area of the loop, not the circumference.

#30

Calculate the current in the loop once you have found the resistance (using the resistivity equation from chapter 17). The maximum torque occurs when sin(theta) is maximized, and that is when sin(theta) equals 1.

#36

Use the formulas we derived in lecture (also on your formula sheet).

#48

This is conceptually similar to chapter 15, #10. We have done similar problems in lecture.

#50

We also did problems similar to this one in lecture.

#56 #56 (cont)

Use equation 19.14 to solve this. Should be straight-forward.

#58

Calculate the force on each of the four sides of the loop, then add the forces together as vectors. It should be easy since two of the forces will completely cancel out (can you guess which two?).

#62

Calculate the resistance first using ch 17 methods, then use equation 19.16 to find the current. With current and resistance, you can calculate power dissipated.

Suggested problems from chapter 19:

C1, C3, C4, C5, C9, C10, C11, C12, C13, C14, C15, C17, #1, #3, #4, #5, #6, #7, #9, #11a #11b, #12, #13, #14, #15, #16, #17, #19, #21, #23, #24, #25, #27, #28, #29, #32, #33a #33b, #34, #35, #37, #38, #39, #41, #42, #43, #44, #45, #46a #46b, #47, #49, #51, #55, #57, #59, #60, #61a #61b, #63, #66a #66b, #67, #69a #69b, #71a #71b, #76