Chapter 3: Electricity

A material through which an electric charge can move easily is

• a resistor.

• an insulator.

• a filament.

• a conductor.

Which material would be the BEST insulator for a metal wire?

• silver

• graphite

• glass

• copper

Five light bulbs are wired on one circuit. Three bulbs are lit, two are not. What type of circuit is this?

• series circuit

• parallel circuit

• open circuit

• short circuit

A good energy source for a simple circuit is

• a battery.

• a copper wire.

• a light bulb.

• a switch.

Which of these materials is a conductor?

• rubber

• chalk

• gold

• glass

What is one use for an insulator?

• It slows down the flow of electric current to produce heat and light.

• I stores electric energy for later use.

• It allows electric current to flow through it.

• It makes electrically charged objects safe to handle.

Electric current cannot flow in a series circuit if

• the circuit contains an insulator.

• there is a break n the circuit.

• the circuit contains a resistor.

• the circuit has only one loop in it.

What will happen in a parallel circuit if one of its loops is broken?

• electric current will not flow through any of the loops

• electric current will still flow through the broken loop

• electric current will still flow through the unbroken loops

• the energy source will stop provideing the energy to move electric charges

A washing machine is an example of transforming

• electricity into motion energy.

• motion energy into electric energy

• electricity into light

• heat into motion energy

Which of the following is caused by the energy of motion?

• resistor

• friction

• conductor

• filament