Electrical Resistance 0.0 / 5 ? PhysicsElectricityGCSEOCR Created by: Maza2999Created on: 01-04-14 13:13 What is resistance measured in? Ohms Ω 1 of 5 What causes the resistance in a wire to increase, and the current to decrease? The length or the thickness of the wire increasing. 2 of 5 Why are resistors added to a circuit? To reduce the current flowing 3 of 5 What is a rheostat? A rheostat is another name for a variable resistor, whose resistance can be changed to change the flow of a current. 4 of 5 How do you calculate resistance? Resistance = voltage ÷ current 5 of 5
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