EC: Electric Circuits

The typical household voltage that is provided by your outlet is

• 5 Volts

• 9 Volts

• 12 Volts

• 120 Volts

The kw-hr is a unit of

• Voltage

• Power

• Energy

• Current

An electrical meter that is built with a very high resistance is a(n)

• voltmeter

• ammeter

• kilometer

• none of the above

An electrical meter that is built with an extremely small resistance is a(n)

• voltmeter

• ammeter

• nanometer

• none of the above

The filament of a lightbulb is made of

• aluminum

• copper

• gold

• tungsten

A 1000 Watt microwave is operated for 15 minutes. The electric company charges $0.20 per kW-hr. How much does it cost to operate the microwave?

• 5 cents

• 20 cents

• 3 dollars

• 5 dollars

The symbol represents a ________________ and the long side represents the ________________ side.

• cell, positive

• cell, negative

• battery, positive

• battery, negative

AA cells are used for some remote controls. The voltage of a AA Cell is

• 12 V

• 9 V

• 3 V

• 1.5 V

A 60 Watt bulb is installed in a lamp that is plugged into the wall. (Assume you are in the United States). What is the current running through the bulb?

• 0.5 Amps

• 2 Amps

• 7.2 Amps

• 7200 Amps

A NINJA coffemaker is rated at 1450 Watts. It operates for 10 minutes to brew a pot of coffee. How much energy does it use?

• 2.42 Joules

• 145 Joules

• 14500 Joules

• 870,000 Joules