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?
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Card 7
Front
A 250W computer is switched on for 4 hours. How many Units of electricity does it use?
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Card 8
Front
A 2 kW electric fire is switched on for 30 minutes. How many Units of electricity does it use?
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Card 9
Front
If one Unit of electricity costs 10p, how much will 30 Units cost?
