P4 flashcards

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What is a static charge ?
A static charge is a charge that does not move it is created by rubbing two electrical insulators together.
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Name 2 uses of static ?
Dust precipitators, paint spraying and crop dusting.
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What is resistance ?
How easily current can flow.
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What colour is the live wire ?
Brown
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What is the use of an earth wire ?
The earth wire is a safety wire to prevent the casing of the appliance becoming live.
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What are the threee fuses used in the uk ?
3,5 and 13 amps.
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What is an RCD ?
RCD stands for residual current device. An RCD is a safety device also known as a circuit breaker.
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What is a fuse ?
A fuse prevents the device from getting damaged in a power surge. Designed to melt to break the circuit.
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What is double insulation ?
It means that you do not need an earth wire as it has a plastic coating.
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What is ultrasound ?
Ultrasound is a longitudinal wave above 20,000 Hz whichi is about the threshold of human hearing.
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What is half-life ?
Half-life is the time it takes to half the number of whatever you have.
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What is transmutation ?
When an unstable atom gives out an alpha or beta particle it will change the atom.
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Other cards in this set

Card 2

Front

Name 2 uses of static ?

Back

Dust precipitators, paint spraying and crop dusting.

Card 3

Front

What is resistance ?

Back

Preview of the front of card 3

Card 4

Front

What colour is the live wire ?

Back

Preview of the front of card 4

Card 5

Front

What is the use of an earth wire ?

Back

Preview of the front of card 5
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