Physics 222 Worksheet: Chapter 19, Circuits (Part 2)

1) If the length and diameter of a conductor are both doubled, the resistance will be.

a) unchanged.

b) doubled.

c) cut in half.

d) changed by some other amount.

2) Which of the following is not a source of potential difference?

a) battery

b) semiconductor

c) generator

d) photo cell

3) Silicon is an example of a(n)

a) conductor.

b) semiconductor.

c) insulator.

4) Which of the following diagrams represent AC ? _______

5) Which of the following diagrams represent DC ? _______

a)

6) Resistors in series have the same

a) current.

b) voltage.

c) power.

7) Resistors in parallel have the same

a) current.

b) voltage.

c) power.

8) A 100 W resistor is in series with a 200 W resistor.

a) The voltage drop is the same across both.

b) The voltage drop across the 100 W resistor is one half  the drop across the 200 W.

c) The voltage drop across the 100 W resistor is twice the drop across the 200 W.

9) A 100 W resistor is in parallel with a 200 W resistor.

a) The current is the same in both.

b) The in the 100 W resistor is one half the current in the 200 W.

c) The current in the 100 W resistor is twice the current in the 200 W.

10) When a battery is discharging the terminal voltage drops. This is because the battery has

a) less EMF while discharging.

b) less charge while delivering current.

c) internal resistance.

Ans: 1-c, 2-b, 3-b, 4-c, 5-a, 6-a, 7-b, 8-b, 9-c, 10-c