Electricity

The ampere is a unit of

• magnetism.

• electric current.

• electric charge.

• temperature.

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NGSS.HS-PS2-5

In what kind of a circuit would you find the different parts of the circuit on separate branches?

• parallel

• series

• single path

• closed circuit

A circuit connected to Earth with a three-pronged plug is called

• wattage.

• multiplying.

• resistant.

• energy efficient.

Power is calculated by multiplying voltage by

• current.

• energy.

• resistance.

• voltage.

An example of an insulator is

• rubber.

• copper.

• silver.

• iron.

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NGSS.MS-PS3-3

Materials through which charge can flow easily are called

• insulators.

• conductors.

• resistors.

• magnets.

A complete, unbroken path through which electric charges can flow is a(n)

• electric circuit.

• electrical resistance.

• magnetic field line.

• magnetic pole.

What is a disadvantage of using fuses?

• When a fuse burns out, it cannot be used again.

• A fuse shuts off when the current gets too high.

• A fuse contains a thin strip of metal that can melt.

• A fuse prevents circuits from overheating.

The build-up of charges on an object is called

• static discharge.

• static electricity.

• positive charge.

• negative charge.

If an electric water heater uses 30 kW of power and runs for 7 hours, what is the total amount of energy used?

• 23 kilowatt-hours

• 37 kilowatt-hours

• 210 kilowatt-hours

Tags

NGSS.HS-PS3-1