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 21

#4

Answer each part with 3 SF.

#6

In part (c), treat 377 as 120 * (pi) in order to find the voltage more precisely.

#12

Recall that angular frequency = 2 * (pi) * frequency.

#14

Answer with 3 SF.

#16

Use the frequency from part (a) when solving part (b).

#22

Answer with 3 SF.

#24

The voltage here is given as an rms value, and part (a) is asking for the rms current. For (b), just set the impedance equal to double your impedance from part (a), then solve for the inductive reactance and thus, the inductance.

#32

Remember that power is calculated using rms values. Answer with 3 SF.

#34

The frequency of the radio station will be equal here to the resonant frequency of the circuit.

#36

For the last part, you should find that the maximum power is delivered when the current is at its maximum ... at resonance.

#38

Consider the house voltage and current to be a set V(1) and I(1). Consider the tape player voltage and current to be a different set V(2) and I(2). For (c), you should get the same answer regardless of which pair of current and voltage you use.

#40

Note that the problem implies for you what the maximum input voltage is. You'll have to convert that to the rms voltage first.

#50

Your answer for this should be very large, on the order of 10^14.

Suggested problems for chapter 21:

C1, C2, C4, C5, C6, C10, C13, C14, C17, C18, #1, #2, #3, #5, #7, #8, #9, #10, #11, #13, #15, #23, #26, #27, #29, #31, #33, #35, #37, #39, #41, #42, #51, #54, #55, #56, #57, #59, #61