Energy and Efficiency 0.0 / 5 ? PhysicsEnergyGCSEAQA Created by: Mr_MackintoastCreated on: 01-03-17 18:13 What is energy measured in? Energy is measured in Joules (J) 1 of 5 How do you get the input energy? Input Energy = Useful Energy Transferred + Wasted Energy 2 of 5 How do you get the efficiency? Efficiency = ((Useful energy by appliance) divided by (total energy to appliance)) x 100% 3 of 5 What result can you not get when calculating the efficiency? More than 100% or 100% unless it is an electric heater 4 of 5 What can be used to represent energy transfer through an appliance? A Sankey Diagram 5 of 5
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