Topic 4.1- Electrical Circuits 0.0 / 5 ? PhysicsElectricityElectrical CircuitsIGCSEAQA Created by: Alice CullenCreated on: 01-01-17 16:24 What is metal an example of? Metal is an example of a substance which electrical charges can easily move through 1 of 15 What is electric current? Electric current is a flow of electric charge 2 of 15 What is the relationship between current, charge and time? Current = Charge ÷ Time 3 of 15 What is the relationship between potential difference, energy transferred and charge? Potential Difference = Energy Transferred ÷ Charge 4 of 15 What do Current-Potential Difference Graphs show? They show how the current through a component varies with the potential difference across it 5 of 15 How can the resistance of a component be calculated? The resistance of a component can be calculated by measuring the current through and the potential difference across the component 6 of 15 What is the relationship between resistance, current and potential distance (in words)? The greater the resistance the smaller the current for a given potential difference across the component 7 of 15 What is the relationship between resistance, current and potential distance? Potential Difference = Current x Resistance 8 of 15 The current through a resistor.... ...is directly proportional to the potential difference across the resistor 9 of 15 The resistance of a filament bulb.... ...increases as the temperature of the filament increases 10 of 15 What way does the current though a diode flow? (Trick Question!) It only flows through in ONE direction (unidirectional) 11 of 15 The diode has a.... ...very high resistance in the other direction 12 of 15 The potential difference provided by cells connected in series.... ...is the sum of the potential difference of each cell (depending on the direction in which they are connected) 13 of 15 When does an LED emit light? An LED emits light when the current flows through it in the forward direction 14 of 15 What happens to a resistor when current flows through it? The resistor gets hot 15 of 15
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