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Tutor HuntTest QuestionsPhysics QuestionsYear 10 Physics Questions

 

Efficiency (GCSE Physics)

The following is a GCSE Physics test covering 'Efficiency' 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 device converts 200 J input into 150 J useful output. What is the efficiency?
Which formula defines efficiency for an energy device?
Which is the best reason to use energy efficient devices in homes?
A heater transfers 5010 J at 12 V. What charge flowed (C)?
Which is the correct definition of efficiency?
A battery supplies 3.24 × 10^11 J at 230 V. What is the charge transferred (C)?
A kett le stores thermal energy for later use. Which quality makes it suitable as energy storage?
If a heater transfers 26 000 J to 2.0 kg of material and raises its temperature by 5 °C, what is the specific heat capacity (J/kg °C)?
Which change will increase energy conversion efficiency in a machine?
If a wind turbine wastes energy through friction, how does oiling moving parts affect efficiency?
A device has 34.2 GJ total energy input and efficiency 0.992. What is its useful energy output (GJ)?