Mains Electricity

Front

Name of the pin labelled 2 in the diagram? Options: Earth, Neutral, Live

Back

Neutral

Front

What colour is the Earth wire in a plug?

Back

Green and yellow

Front

Which is the live wire in the diagram? Options: Number 2, Number 3, Number 4, Number 5

Back

Number 4

Front

What is the potential difference of the mains electricity supply? Options: 230, 240, 230V, 240V

Back

230V

Front

What is the frequency of the mains electricity supply?

Back

50, 50 hertz, 50 Hz

Front

What is the unit of frequency?

Back

Hz, hertz

Front

What does the graph on the left show?

Back

direct current

Front

Which diagram shows an oscilloscope trace of alternating current?

Back

right hand diagram

Front

Which is the symbol for a fuse? (Diagrams numbered 1, 2, 3, 4 from left to right)

Back

1

Front

What is number 3 the symbol for?

Back

A fixed resistor