The National Grid 0.0 / 5 ? PhysicsElectromagnetismGCSEEdexcel Created by: sara.5Created on: 12-04-18 12:29 What is the National Grid? The system of wires and transformers that distributes electricity around the country 1 of 6 Where is the significant amount of energy wasted by heating? In the transmission lines 2 of 6 What happens if the voltage of electricity passes through a wire is increased? The current is decreased 3 of 6 Why is this useful in the national grid? When the current is smaller, less energy is wasted by heating and the efficiency is improved. 4 of 6 What does a step-up transformer do? Increases the voltage and decreases the current at the same time 5 of 6 What does a step-down transformer do? Makes voltage lower the current higher 6 of 6
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