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 affects the efficiency of an appliance?

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

What is the equivalent of 1 kilowatt in watts?

Which energy transfer is involved when a bulb lights up?

What is the unit of energy transferred commonly used with power ratings?

Which power rating is suitable for a railway engine?

Order of magnitude calculations give a value rounded to:

What does wasted power mean?

What is the SI Unit used for power?

How does increasing power affect the rate of energy transfer?

What is the definition of power in physics?

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