1.9 Energy And Power (GCSE Physics)

The following is a GCSE Physics test covering '1.9 Energy And Power'

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Question 1

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Calculate the efficiency if useful power out is 250 W and total power in is 500 W.

How do you calculate efficiency using power?

What is the SI Unit used for power?

Which energy transfer is involved when a bulb lights up?

If 10,000 joules of energy is transferred by a motor in 10 seconds, what’s the power?

A machine has 300 W input power and 100 W of useful output. How much power is wasted?

What does the power rating of appliances indicate?

What does wasted power mean?

What describes muscle power in lifting weights?

What is the equivalent of 1 kilowatt in watts?

Which appliance typically uses the highest power?

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