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- 1. Multiple Choice
Which one of the following quantities is equivalent to 1 W?
1 V/A
1 Ω • m
1 V • A
1 V/Ω
- 2. Multiple Choice
A kilowatt-hour is equivalent to
1000 W.
3600 J.
3,600,000 J/s.
3,600,000 J.
- 3. Multiple Choice
When 5.00 A is flowing through an 10.0-Ω device, how much power is being dissipated in the device?
50.0 W
250 W
500 W
2.50 kW
- 4. Multiple Choice
A light bulb operating at a dc voltage of 100 V has a resistance of 200 Ω. How much power is dissipated in this bulb?
100 W
60 W
50 W
200 W
- 5. Multiple Choice
A 200-W light bulb is connected across a 100-V dc power supply. What current will flow through this bulb?
0.90 A
0.36 A
0.60 A
2.0 A
- 6. Multiple Choice
If electricity costs $0.15 per kWh, how much does it cost to operate the heater from before (P = 10.1 W) for 30 days?
$0.19
$0.001
$1090.80
$1.09
- 7. Multiple ChoiceHow is electrical energy usually produced?Fuel is burned to produce smoke, which turns a turbine.Fuel is burned to heat water and produce steam, which turns a turbine.Hot fuel is placed in water to produce steam, which then turns a turbine.A turbine blows hot steam onto fuel, which heats it up and produces electricity.
- 8. Multiple ChoiceWhy do many traditional methods of electrical energy production lead to global warming?After the fuel is burned it leaks dangerous chemicals.The heat that burning fuel produces directly leads to global warming.Burning traditional fuel produces nitrogen gas.Burning traditional fuel produces carbon dioxide.
- 9. Multiple Choice
The power of an appliance is...
the amount of voltage going through it
the amount of energy it consumes per second
the number of resistors it contains
- 10. Multiple Choice
A 3000 watt electric dryer is on for one hour. How long would a 1000 watt microwave have to be cooking in order to use the same amount of electricity as the dryer.
10 minutes
24 hours
3 hours
30 minutes
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