WorksheetsMains Electricity
Total questions: 10
Worksheet time: 5mins
What is the name of the pin labelled 2 in the diagram?
Earth
Neutral
Live
What colour is the Earth wire in a plug?
Red
Red and black
Green
Green and yellow
Which is the live wire in the diagram?
Number 2
Number 3
Number 4
Number 5
What is the potential difference of the mains electricity supply? (a) volts
What is the frequency of the mains electricity supply? (do not worry about the units here)
(a)
What is the unit of frequency?
(a)
What does the graph on the left show?
direct current
alternating current
Which diagram shows an oscilloscope trace of alternating current?
left hand diagram
right hand diagram
Imagine the diagrams are numbered 1,2,3,4 from left to right.
Which is the symbol for a fuse?
1
2
3
4
Imagine the symbols are numbered 1,2,3,4 from left to right.
What is number 3 the symbol for?
A variable resistor
A fuse
A lamp
A fixed resistor
