1. A color television needs to be plugged into a 120-volt circuit. It uses 2.5 amperes. What is the television's wattage?
Select one:
a. 48 amps
b. 48 watts
c. 300 volts
d. 300 watts
2. What is the power of an appliance that is operating at a current of 2 amps and a voltage of 120 volts?
Select one:
a. 240 ohms
b. 240 watts
c. 60 watts
d. 60 ohms
3. A light bulb operates at 60 volts and 2 amps. What is the power of the bulb? One Kilowatt-hour is equal to 1000 watts of power used for one hour of time.
Select one:
a. 120 ohms
b. 120 watts
c. 30 watts
d. 30 ohms
4. What is the current through a wire that has a resistance of 30 ohms if the voltage is 45 volts?
Select one:
a. 0.67 watts
b. 1.5 watts
c. 1.5 amps
d. 0.67 amps
5. One light bulb requires 100 watts of power. How much energy does this light bulb need in order to operate for eight hours?
Select one:
a. 800 kWh
b. 800 amps
c. 12.5 kWh
d. 12.5 ohms
6. A current of 0.5 amperes flows through a wire. What is the wire's resistance if the voltage is 50 volts?
Select one:
a. 100 ohms
b. 100 watts
7. A washing machine uses six amperes of current in a 120-volt circuit. How much power does it use?
Select one:
a. 720 watts
b. 720
c. 6 watts
d. 6 amps
8. The wattage of a vacuum cleaner is calculated to be 1,080 watts. If it is in a 120-volt circuit, how many amperes of current does the vacuum cleaner draw?
Select one:
a. 9 amps
b. 0.1 amps
c. 9 volts
d. 9 watts
9. A clothe dryer has a wattage of 2.4 kilowatts. If it is in a 120-volt circuit, what is the amperes it needs to run?
Select one:
a. 20 amps
b. 20 watts
c. 50 amps
d. 50 ohms
10. What is the power in watts of a 0.2 kilowatt light bulb? (HINT: convert kwh to watts)
Select one:
a. 2000 watts
b. 20 watts
c. 20 kWh
d. 200 watts