Introduction to Electricity

Materials in which electric charges move freely called ....

• insulators

• conductors

• semi-conductors

Materials in which electric charge do not move freely called .....

• insulators

• conductos

• Metalloids

In the electrical circuit above the bulb will turn on if the wires are connected to each terminal. What happens when one wire is disconnected?

• The bulb will still be lit

• The electrons will still be able to travel through the wire and provide electricity to the power pack

• The bulb will blow out and not be able to be switched on again

• The bulb will switch off

Why are wires plastic coated?

• To prevent resistance escaping a wire

• Because insulators are good conductors of heat

• Because the high resistance in tungsten causes the wire to become red hot

• To prevent electric current from escaping into other conductors and our body

What kind of circuit is this?

• Series
• Consecutive
• Parallel
• Training

This circuit has more than one loop. When one light goes out, the others stay on. 

• closed circuit
• series circuit
• parallel circuit
• open circuit

Which statement is true?

• The light bulb will light up because the  circuit is complete.
• The light bulb will light up because the  circuit is broken.
• The light bulb will not light up because the  circuit is complete.
• The light bulb will not light up because the  circuit is broken.

What kind of circuit is this?

• series
• parallel