Q.1
Why are insulators important in an electrical circuit?
  • They make the circuit safe to touch
  • Electricity will only flow through insulators
  • Light bulbs and buzzers are only made of insulating materials
  • All of the above
Q.2
Why are electrical plugs made of plastic?
  • Plastic is stronger than all other materials
  • Plastic is a good electrical conductor
  • Plastic protects people from electricity
  • Only plastic can be made into the right shape for a plug
Q.3
Which of these is a good electrical conductor?
  • Water
  • Sweat
  • The human body
  • All of the above
Q.4
Which of these is an electrical insulator?
  • Wood
  • Plastic
  • Silver
  • Glass
Q.5
In a complete electrical circuit, which materials does electricity flow through?
  • Electrical insulators
  • Electrical conductors
  • Only leads or wires
  • Only batteries
Q.6
The filament in a light bulb glows because of the material's resistance. What does this mean?
  • The filament does not allow the flow of electricity
  • The filament speeds up the flow of electricity
  • The filament slows down the flow of electricity
  • The filament gets annoyed with the electricity
Q.7
Which of these is an electrical conductor?
  • Gold
  • Copper
  • Aluminium
  • Rubber
Q.8
A material which is an electrical insulator does what?
  • It does not allow electricity to pass through it easily
  • It does not allow heat to travel through it easily
  • It allows heat to travel through it easily
  • It allows electricity to pass through it easily
Q.9
A material which is an electrical conductor does what?
  • It does not allow electricity to pass through it easily
  • It does not allow heat to travel through it easily
  • It allows heat to travel through it easily
  • It allows electricity to pass through it easily
Q.10
Which of these could be used to complete an electrical circuit?
  • A piece of gravel
  • A rubber
  • A crayon
  • A pair of scissors
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