CCW 8th Grade Electricity Quiz

The buildup of charges on an object is called

• a. static discharge.

• b. static electricity.

• c. electricity

• d. magnetism

Tags

NGSS.MS-PS2-3

What causes charges to move in a circuit?

• a. voltage

• b. energy

• c. current.

• d. potential.

If an electric water heater uses 40 kW of power and runs for 8 hours, what is the total amount of energy used?

• a. 5 kilowatt-hours

• b. 32 kilowatt-hours

• c. 48 kilowatt-hours

• d. 320 kilowatt-hours

According to Ohm's law, resistance is equal to voltage divided by

• a. time.

• b. conduction.

• c. current.

• d. potential.

What is a disadvantage of using fuses?

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

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

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

• d. A fuse prevents circuits from overheating.

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

• a. electric circuit.

• b. electrical resistance.

• c. magnetic field line.

• d. magnetic pole.

Materials through which charge can flow easily are called

• a. insulators.

• b. conductors.

• c. resistors.

• d. magnets.

An example of an insulator is

• a. rubber.

• b. copper.

• c. silver.

• d. iron.

Tags

NGSS.MS-PS3-3

Power is calculated by multiplying voltage by

• a. current.

• b. energy.

• c. resistance.

• d. voltage.

The ampere is a unit of

• a. magnetism.

• b. electric current.

• c. electric charge.

• d. temperature.

Tags

NGSS.HS-PS2-5