UK GCSE · Physics
Energy and Power
12 practice questions, each with the answer and an explanation.
Practise Energy and Power now
Random questions from this topic, one at a time. You see the answer and the explanation straight after each one.
All 12 questions
- What is the unit of energy?
- A 2 kg mass is lifted through 3 m. What is the gain in gravitational potential energy? (g = 10 N/kg)
- A 4 kg object moves at 3 m/s. What is its kinetic energy?
- A motor transfers 500 J of energy and 400 J is useful. What is the efficiency?
- What is power?
- A 60 W lamp is on for 10 minutes. How much energy does it transfer?
- Which energy resource is renewable?
- Which is a disadvantage of solar cells?
- Which method reduces heat loss from a house by convection and conduction in the loft?
- Which process transfers energy through a vacuum?
- A car of mass 1500 kg travels at 20 m/s. What is its kinetic energy?
- How much energy is needed to heat 0.5 kg of water by 20 degrees Celsius? The specific heat capacity of water is 4200 J/kg per degree Celsius.
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