GCSE - Gcse Physics - Electricity - Household Electricity Solution

Q.1.

What is DC electricity?

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An electrical source supplying current passing in the same direction
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An electrical source supplying current passing in a constantly changing direction
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An electrical source supplying no current
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An electrical source supplying current passing in the opposite direction to voltage

Q.2.

What is AC electricity?

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An electrical source supplying current passing in the same direction
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An electrical source supplying current passing in a constantly changing direction
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An electrical source supplying no current
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An electrical source supplying current passing in the opposite direction to voltage

Q.3.

Most electrical devices connect to the mains supply using what connector?

Q.4.

In a plug there are three wires. What colour is the earth wire?

Q.5.

Why are cables insulated with plastic sheaths?

Q.6.

Why do plugs contain fuses?

Q.7.

Appliances with metal casing are usually what?

Q.8.

What type of current does a cell or a battery produce?

Q.9.

What is the correct formula for calculating the frequency of a supply?

Q.10.

What is the frequency of a supply which has a time period of 100 seconds