Electric Circuits Review

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

• To make it more attractive.

• To help electricity flow along the wire

• To make it safe by keeping electricity in

• To add more energy to the circuit.

Why is electrical wiring usually made from copper?

• Because copper is shiny

• Because copper conducts electricity

• Because copper is not magnetic

• Because copper insulates electricity

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

• An electrical conductor

• An electrical insulator

• An electrical source

• An electric appliance

What are the necessary components of a circuit?

• Energy source, light bulb, wires

• Energy source, switch, light bulb, wires

• Light bulb, wires, switch

• Switch, energy source, light bulb, insulator

___________ wires keep electrons on course & protect us from the dangerous flow of electricity. 

• Insulated
• Conducted

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If the circuit is CLOSED, the switch is _______.

• ON

• OFF

If the electric circuit is OPEN, the switch is ____.

• ON

• OFF

In most electrical circuits, the pathway is made of:

• Metal

• Plastic

• Static

• Wood

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How does rubber differ from most metals?

• Rubber is a good conductor, most metals are good insulators

• Rubber conducts electrons; most metals conduct protons

• Rubber is a good insulator; most metals are good conductors

• Rubber is a good power source; most metals are good conductors

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Which part of the bulb gives off light?

• 1
• 2
• 3
• 4