Electrical Circuit

Why is electrical wiring usually made from copper?

• Because copper is shiny

• Because copper conducts electricity

• Because copper is not magnetic

• Because copper insulate electricity

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

Which of the following can work as an energy source?

• Battery
  
• Light bulb
• Wire
  
• All of them

Which bulbs will light?

• 1 and 2
• 2 and 3
• 3 and 4
• 4 and 2

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.

Why is electrical wiring usually covered with a layer of plastic?

• To make it look pretty

• To help electricity flow along the wire

• To make it safe

• To add more energy

Which of these materials is a good insulator?

• Plastic and metal
• Metal and rubber
• Plastic and rubber

What is the function of the light bulb in a circuit?

• It increases the strength of the electricity.
• It changes electricity to light energy.
• It provides electricity to the battery.
• It opens and closes the circuit.

The circuit on the left is not complete (the light is off) because:

• the switch is closed

• the switch is open

• the battery is missing

• the battery is in backwards