Login
Login
Login
Register

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.
Start Test
Incorrect: 0
Correct: 0
Question 1
...
Congratulations - you have completed the test!
Your final score was

Below a typical questions that will be covered in this test. You final score will be logged on your account

A factory motor requires 50 kW. The supply voltage is 400 V. What current must the supply provide (ignoring losses)?
If a transmission cable has a resistance of 0.8 O and carries a current of 500 A, what is the power lost as heat in the cable?
Why is efficiency always less than or equal to 1 (or 100%) for real electrical devices?
Which change will reduce the power loss in a cable that transmits fixed power?
A wind turbine generates 2.5 MW at tip speed where a bird strike transfers 5000 J instantly. How long would the turbine take to produce that energy at 2.5 MW?
A wind farm has mean power output 696 MW and supplies 580 000 homes. What is the mean power per home (in W)?
A power station generates 500 MW for one hour. How much energy is produced in J?
A heater draws 2.0 A from a 12 V supply. What is its power?
Which of these is a correct statement of the power in terms of force and speed?
A 500 W motor lifts a 20 kg mass at constant speed. What is the mass’s vertical speed? (g = 9.8)
A power supply delivers 24 V across a resistor and the current is 3 A. If the resistor is replaced by another with double the resistance, what happens to the power dissipated?