The energy transferred by an electrical appliance can be calculated using this equation: energy = power × time How much energy is transferred by a 500 W electric drill in 30 seconds?
15,000 J
1 of 5
A 250W computer is switched on for 4 hours. How many Units of electricity does it use?
A 250W computer is switched on for 4 hours. It would use 1 unit of electricity.
2 of 5
A 2 kW electric fire is switched on for 30 minutes. How many Units of electricity does it use?
A 2 kW electric fire is switched on for 30 minutes. It would use 1 unit of electricity.
3 of 5
If one Unit of electricity costs 10p, how much will 30 Units cost?
£3
4 of 5
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hi
5 of 5
Other cards in this set
Card 2
Front
A 250W computer is switched on for 4 hours. How many Units of electricity does it use?
Back
A 250W computer is switched on for 4 hours. It would use 1 unit of electricity.
Card 3
Front
A 2 kW electric fire is switched on for 30 minutes. How many Units of electricity does it use?
Back
Card 4
Front
If one Unit of electricity costs 10p, how much will 30 Units cost?
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