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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Which power rating is suitable for a railway engine?

A 100 W bulb transfers 2000 J of energy. How much time is needed?

What describes muscle power in lifting weights?

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

What does 1 watt equal to in terms of joules and seconds?

Which is a common device used to lift heavy objects by transferring electrical to gravitational energy?

How do you calculate efficiency using power?

What type of energy is usually produced as wasted power in motors?

How does increasing power affect the rate of energy transfer?

What is the equivalent of 1 kilowatt in watts?

What is the SI Unit used for power?

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