Chapter 22 Current & Electricity

The unit of measurement for charge is

• Watt

• Ohm

• Coulomb

• Joule

The unit of measurement for potential energy is

• Ampere

• Joule

• Watt

• Volt

The unit of measurement for current is

• Ampere

• Ohm

• Volt

• Watt

The unit of measurement for resistance is

• Watt

• Joule

• Coulomb

• Ohm

The unit of measurement for power is

• Joule

• Volt

• Watt

• Ohm

A 9-V battery is connected to a toy car, and the current produced is 2 A. The rate at which energy is delivered to the toy car is ______?

• 4.5 J

• 18 J

• 4.5 W

• 18 W

A 60-W light bulb runs for 2 hours. How much energy is consumed?

• 30 J

• 120 J

• 120,000

• 432,000

A heater that operates at 220 W is connected to 110-V outlet. The current that flows through the heater is _________?

• 0.5 A

• 2 A

• 2.2 A

• 20 A

The current through a resistor of 15 Ω is 5 A. The voltage drop across the resistor is __________.

• 3 v

• 75 V

• 0.34 V

• 45 V

A household's electric bill is $56 for a certain month and the cost of electricity is $0.12 per kilowatt-hour. The household used ____ of energy during the month

• 25 kWh

• 467 kWh

• 50.3 kWh

• none of the above