mains electricity

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5 Terms

1
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explain how a fuse works

if current is too high, the fuse overheats and melts, this turns off the circuit

2
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give two advantages of connecting lamps in parallel rather than series

  • can all be switched separately

  • others stay alight when 1 blub blows

3
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give some advantages of using a circuit breaker instead of a fuse

  • circuit breakers are resettable

  • circuit breakers work instantly/fuses don’t

  • doesn’t require earth wire

  • circuit breakers are more sensitive

4
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what is d.c

current that flows in one direction only

5
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