P2, Electrical Circuits 0.0 / 5 ? PhysicsElectricityGCSEAQA Created by: emmajane_Created on: 13-04-14 11:51 What is Potential difference and what i sit measured in? It is the amount of joules per column of charge. Measured in volts (V) 1 of 11 What is current and what is it measured in? Current is the amount of charge per second passing a point in the circuit. Measured in amps (I) 2 of 11 What is resistance and what is it measured in? It is the ratio of potential difference across a component to the current flowing through it. Measured in Ohms 3 of 11 What is current directly proportional to? Potential difference 4 of 11 What happens if you the double potential differene in a circuit? The current also doubles, but the resistance remains the same 5 of 11 What should you get if you plot a graph of potential difference and current? You should get a straight line passing through the origin (0,0) 6 of 11 What is Ohms law? "The electrical current in a conductor is proportional to the potential difference applied to it, provided the temperature stays the same" 7 of 11 What is the equation for Ohms law? Potential difference= current x resistance 8 of 11 What is current measured by in a circuit? Measured by an ammeter, which is connected to a series 9 of 11 What is Potential difference measured by in a circuit? Measured using a voltmeter, which is connected in parallel 10 of 11 What does measuring the current and potential difference allow you to do? Calculate the resistance 11 of 11
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