# Physics revision P1.1 + P1.2 Electrical appliances

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• Created by: melisa
• Created on: 18-09-13 22:43
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
hi
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?

### Card 4

#### Front

If one Unit of electricity costs 10p, how much will 30 Units cost?

hi