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Tutor HuntTest QuestionsPhysics QuestionsYear 10 Physics Questions

 

Power (GCSE Physics)

The following is a GCSE Physics test covering 'Power' from the broader topic Energy. The test is geared towards the AQA exam board style syllabus.
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Below a typical questions that will be covered in this test. You final score will be logged on your account

A resistor in a circuit has 5 V across it and dissipates 20 W. What is the current through it?
What is the SI unit of power?
A heater draws 2.0 A from a 12 V supply. What is its power?
Which expression gives energy (E) in terms of power (P) and time (t)?
A device uses 1500 J of energy in 5 seconds. What is its power?
A kettle is rated 2.4 kW. How much energy does it use in 30 minutes of operation?
A heater has P = 2000 W and runs for 2 hours. What energy (in kWh) is used?
A home appliance is rated 3.0 kW. If electricity costs 15 p per kWh, how much does running it for 3 hours cost (in pence)?
Which is the best description of power efficiency?
A 500 W motor lifts a 20 kg mass at constant speed. What is the mass’s vertical speed? (g = 9.8)
A person raises a 60 kg box by 2.0 m in 4.0 s (g = 9.8 N/kg). What is the average power output of the person?