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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What type of device typically converts energy transfer faster?

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

What is the definition of power in physics?

Which power rating is suitable for a railway engine?

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

What does wasted power mean?

What does the power rating of appliances indicate?

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

What is the equivalent of 1 kilowatt in watts?

How does increasing power affect the rate of energy transfer?

An electric bulb is 15% efficient. If the input power is 100 W, what’s the useful power?

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