5.1 Alternating Current Flashcards

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1
Q

What is a direct current?

A

Current that passes in one direction only (DC)

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2
Q

What is alternating current

A

Current that is in a circuit that repeatedly reverses its direction (AC)

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3
Q

What is the frequency of the UK mains supply

A

50 Hz

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4
Q

What is the voltage of the mains?

A

230 volts (V)

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5
Q

What is frequency?

A

The number of wave crest passing a fixed point every second

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6
Q

What is oscilloscope?

A

a device used to display the shape of an electrical wave

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7
Q

What is a neutral wire? Colour?

A

The wire in a mains circuit that is earthed at the local substation so that the potential is close to zero Blue

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