1. There is a repulsive force between two charged objects when
charges are of like sign.
charges are of unlike sign.
c. they have the same number of electrons.
d. they have the same number of protons.

2. There is an attractive force between two charged objects when
charges are of unlike sign.
charges are of like sign.
c. they have the same number of protons.
d. they have the same number of electrons.

3. When there is an equal amount of positive and negative charges on an object, the object is
a. positively charged.
b. neutral.
c. negatively charged.
d. supercharged.

4. Electric force varies depending on the
a. charge and distance between charged objects.
b. charge and mass of charged objects.
c. height and mass of charged objects.
d. mass and distance between charged objects.

5. Potential difference is measured in
a. amperes.
b. coulombs.
c. volts.
d. joules.

6. Potential difference is measured in
a. amperes.
b. coulombs.
c. volts.
d. joules.

7. An electric current is produced when charges are accelerated by an electric field to move to a position of potential energy that is
a. higher.
c. equal.
b. lower.
d. infinite.

8. Current is the rate at which charges move through a(n)
a. conductor.
b. voltage.
c. insulator.
d. joule.

9. Potential differences causes
a. electrons to move from the positive terminal to the negative terminal.
b. electrons to move from the negative terminal to the positive terminal.
c. protons to move from the positive terminal to the negative terminal.
d. protons to move from the negative terminal to the positive terminal.

10. The brightness of a light bulb is determined by its filament’s
a. voltage.
b. watts.
c. amperes.
d. resistance.

11. The SI unit of resistance is the
a. volt.
b. ohm.
c. ampere.
d. joule.

12. A flashlight bulb with a potential difference of 4
A flashlight bulb with a potential difference of 4.5 V across its filament has a power output of 8.0 W. How much current is in the bulb filament?
a. 3.7 A
b A
c. 1.8 A
d A

13. What is the potential difference across a resistor that dissipates 5
What is the potential difference across a resistor that dissipates 5.00 W of power and has a current of 5.0 A?
a. 1.0 V
b V
c. 125 V
d V

14. There is a potential difference of 12 V across a resistor with 0
There is a potential difference of 12 V across a resistor with 0.25 A of current in it. The resistance of the resistor is
a. 48 W c. 12 W
b. 24 W d W

15. A 13 ohm resistor has 0. 050 A of current in it
A 13 ohm resistor has A of current in it. What is the potential difference across the resistor?
a. 6.5 V c V
b V d V

16. A resistor has a resistance of 280 ohms
A resistor has a resistance of 280 ohms. How much current is in the resistor if there is a potential difference of 120 V across the resistor?
a. 160 A c A
b A d. 2.3 A

17. Appliances connected so that they form a single pathway for charges to flow are connected in a(n)
a. series circuit. c. open circuit.
b. parallel circuit. d. closed circuit.

18. What is the current of this circuit?

19. 1. What is the voltage of the battery in this circuit?