Topic 2 - Electricity 0.0 / 5 ? PhysicsElectricityGCSEAQA Created by: Thomas DowdingCreated on: 21-11-17 16:21 What is the definition of electrical current (I)? The flow of electrons 1 of 18 Which unit is used to measure current? Amps, A 2 of 18 What is the definition of voltage/potential difference (V)? The driving force of a current 3 of 18 What is the definition of resistance? Anything that slows the flow of a current down. 4 of 18 The greater the resistance across a component, the ____ the current that flows Smaller 5 of 18 What is measured using the Ohms unit? Resistance 6 of 18 What is the equation for voltage? V = I x R 7 of 18 What is a light dependent resistor? A resistor that is dependent on light intensity (resistance falls in bright light) 8 of 18 What is a thermistor? A resistor that is dependent on temperature (resistance drops in hot conditions) 9 of 18 Is potential difference shared in a series circuit? Yes 10 of 18 Is current the same in a series circuit? Yes 11 of 18 Does resistance add up in a series circuit? Yes 12 of 18 AC is... Mains supply 13 of 18 DC is... Battery supply 14 of 18 The live wire is... brown (provides alternating potential difference) 15 of 18 The neutral wire is... blue (completes the circuit) 16 of 18 The earth wire is... green/yellow (protects the wiring) 17 of 18 Equation for energy Energy (J) = Power (W) x Time (s) 18 of 18
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