Electrical energy, power and the national grid quiz

This test will test you on your physic skills especially electrical energy, power and the national grid

?
How do you work out power (in watts,W)
energy transferred / time taken
1 of 10
If a motor transferrs 1000Joules of energy in 10 seconds
100W
2 of 10
How do you work out how much you use on electricity?
total cost= number of kWh used * cost per kWh
3 of 10
Is it true that the national grid supplies us with electricity?
True
4 of 10
If a games console was using 200 kWh for 2 hours and the cost per kW h was 7p. What is the total cost?
£1.40
5 of 10
What is the wasted energy of a hairdryer?
sound and some thermal
6 of 10
Is it true that a motor useful energy is kinetic and potential energy?
True
7 of 10
Is it dangerous to use a 100W bulb in a 50W socket?
True
8 of 10
Work out the cost of 1442kW h at 7p per kW h
£2.60
9 of 10
Does a light bulb radiate more heat than light? True or False
True
10 of 10

Other cards in this set

Card 2

Front

If a motor transferrs 1000Joules of energy in 10 seconds

Back

100W

Card 3

Front

How do you work out how much you use on electricity?

Back

Preview of the front of card 3

Card 4

Front

Is it true that the national grid supplies us with electricity?

Back

Preview of the front of card 4

Card 5

Front

If a games console was using 200 kWh for 2 hours and the cost per kW h was 7p. What is the total cost?

Back

Preview of the front of card 5
View more cards

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