P3 0.0 / 5 ScienceEnergy and efficiencyGCSEOCR Created by: Laura990Created on: 04-04-14 15:46 If something supplies energy it also supplies what? energy 1 of 9 In an electric circuit what does the charge of the wire transfer the energy to? components/ devices 2 of 9 What is the power of a circuit? The rate of energy transfer 3 of 9 How would you work out the cost of energy? cost = number of kWh (multiplied by) cost per kWh 4 of 9 Where does the energy in a circuit come from? the current flowing through it 5 of 9 how do you find the power of a component in a circuit? measure the voltage and the current and multiply them together 6 of 9 true or false: more efficient machines waste less energy? true 7 of 9 true of false: some energy is always lost? false-it's all converted into different forms 8 of 9 What are sankey diagrams? energy transformation diagrams 9 of 9

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