Calculating efficiency (in terms of useful energy transferred)
Quiz by Oak National Academy: GCSE Physics Edexcel Higher
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6 questions
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- Q1Energy is ______ when it is transferred to the thermal store of the surroundings.Users enter free textType an Answer30s
- Q2Which of the following is a correct definition for efficiency?The amount of energy that makes something useful happen.The fraction of the energy supplied that makes something useful happen.The fraction of the energy supplied that dissipates.The amount of energy that dissipates.30s
- Q3Which of the following equations show the correct relationship between efficiency, useful output energy transfer and total input energy transfer?Users sort answers between categoriesSorting30s
- Q4A forklift truck transfers 24 000 J of energy when lifting a box onto a high shelf. Calculate the efficiency of the truck if 18 000 J of energy is transferred to the gravitational store.1.336000 J18 000 J0.750.75 J30s
- Q5Aisha is investigating how the temperature of a tennis ball affects its rebound height. Which of the following are control variables for this experiment?Users sort answers between categoriesSorting30s
- Q6An elevator has an efficiency of 0.8. When it lifts four people to the tenth floor, it uses 160 000 J of energy. How much energy is transferred to the people?32 000 J128 000 J200 000 J50 000 J30s