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Card 16

Front

why do metal cases on a plug need an earth wire?

Back

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Card 17

Front

what is a fuse?

Back

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Card 18

Front

what happens if a fault occurs in an earthed appliance?

Back

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Card 19

Front

what should the rating of the fuse be>

Back

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Card 20

Front

what is a circuit breaker?

Back

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Card 21

Front

what does a residual circuit breaker do?

Back

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Card 22

Front

what is power?

Back

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Card 23

Front

what is the equation for power?

Back

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Card 24

Front

what is the equation that uses potential difference and current to work out the amount of power?

Back

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Card 25

Front

what is the eletrical current?

Back

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