Conductors & Insulators

A material which allows electrical current to pass through it is called

• a conductor

• an insulator

• a cell

• a connection

Which of these materials would NOT be a good conductor?

• Copper

• Glass

• Silver

• Iron

Why are electrical wires covered with plastic or rubber?

• Plastic and rubber are comfortable materials to touch.

• Smooth matierials keep wires from getting tangled.

• Plastic and rubber are good elelctrical insulators

• Plastic and rubber can be made in different colours so people can tell different leads apart.

A material which is an electrical insulator ....

• does not allow electricity to pass through it easily.

• does not allow heat to travel through it easily.

• allows heat to travel through it easily.

• allows electricity to pass through it easily.

In a complete electrical circuit , which material does the electricity flow through

• Electrical insulators

• Electrical conductors

• Only leads and wires

• Only batteries

What is a electrical circuit?

• A series of conductors and insulators

• A collection of electrical equipment

• A path around which an electrical current flows

• A light bulb and battery

With which group of items could you NOT build a complete circuit?

• crocodile leads, bulbs,switch, buzzer

• bulbs, crocodile leads, cell

• wires, bulb, cell

• cell, switch, buzzer, crocodile leads

What will a circuit with an open switch do?

• It will make a good electrical insulator.

• It will not allow electricity to pass through.

• It will resist electricity.

• It will allow electricity to pass through.

What is a switch's function in a circuit?

• To make the current hotter or colder

• Be the pathway that current flows along

• To turn on and off the flow of current

• To add more power to the circuit

Wood is a _____?

• conductor

• insulator