Basic Electric

Safety devices that prevent the overheating of electric wires are known as:

• fuses and busters
• fuses and circuit breakers
• circuit breakers and volts
• fuses and conductors

Rapid and interrupted current that changes direction 60 times per second is known as:

• direct current
• nonconductor curre
• alternating current
• Erratic current

What does the switch do in a circuit?

• It supplies the power.

• It carries electricity.

• It opens and closes the circuit or switch.

• It is an insulator.

Copper is a good conductor of electricity.

• true
• false

Rubber is a good insulator.

• true

• false

To complete a circuit the switch must be

• unattached
• open
• closed

When the switch is closed, the light

• comes on
• stays off
• burns out

Which of the following is evidence that energy is present and electricity is flowing?

• A component gets hot.
• A light bulb shines.
• A motor spins.
• All of the above.

A light bulb in a circuit transfers energy into 

• Motion
• heat and light
• sound and light
• light

Alternating current is what we find at our wall outlet.

• True
• False