Elecricity

Current electricity flows through

• wires

• string

• rubber

• plastic

How does a switch work?

• It opens and closes the circuit

• It makes the light bulb brighter

• It provides the energy for the circuit.

Which of the following is an insulator?

• copper

• wood

• silver

• salt water

Which of the following materials is an electrical conductor?

• Plastic spoon

• Silver-colored plastic spoon

• copper spoon

• wooden spoon

A material that does NOT let electricity pass through it is called ...

• An electrical conductor

• An electrical insulator

• An electrical source

• An electric appliance

An incomplete circuit is shown.
To complete the circuit, a wire should be placed from —

• Point D to Point C
• Point B to Point C
• Point A to Point D
• Point B to Point D

Choose the correct sentence.

• This circuit will work because it is an open circuit.
• This circuit will work because it is a closed circuit.
• This circuit will NOT work because it is an open circuit.
• This circuit will NOT work because it is a closed circuit.

The flow of electricity in a circuit-

• current
• flow
• circuit

To complete a circuit the switch must be

• unattached
• open
• closed

Two batteries in a circuit make the lights in the circuit brighter than one battery.

• true
• false