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2 Electricity

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Question 47
F

A hairdryer has a plastic case. Why can it be connected to the mains using a cable that has only two wires?

[1]
A

The neutral wire is able to do the job of the earth wire

B

Plastic has a much lower resistance than metal does

C

A plastic case cannot carry a current to the neutral wire

D

A plastic case cannot become live, so no earth wire is needed

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2 Electricity Questions

  1. GCSE
  2. /Physics
  3. /2 Electricity

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