Physics - Electricity 0.0 / 5 ? PhysicsElectricityIGCSEAQA Created by: Rebecca_hamiltonCreated on: 10-04-17 16:59 What colour is the live wire? Brown 1 of 22 What voltage is the UK's main's supply, supplied to domestic users? 230V 2 of 22 What wire is the green and yellow wire? Earth 3 of 22 What happens when a fuse melts? Breaks circuit 4 of 22 What does LDR stand for? Light dependant resistor 5 of 22 What type of transformer is used in the National Grid? Step-up 6 of 22 What is rate of flow of charge? Current 7 of 22 What is a resistor whose resistance depends on temperature? Thermistor 8 of 22 What allows a current in one direction only? Diode 9 of 22 What frequency is the UK's mains supply? 50Hz 10 of 22 What enables a current in a circuit to be switched on or off? Switch 11 of 22 What breaks a circuit very quickly if there is a difference in current between the live and neutral wire? RCCB 12 of 22 What is used to measure electric current? Ammeter 13 of 22 What emits light when a current passes through it? LED 14 of 22 What is the more efficient lighting than filament lamps? CFL 15 of 22 What draws a very low current? LED 16 of 22 What does LED stand for? Light Emitting Diode 17 of 22 What emits light as a signal when a current passes through it? Lamp 18 of 22 What colour is the neutral wire? Blue 19 of 22 What consists of 2 or more cells? Battery 20 of 22 What is used to measure potential difference? Voltmeter 21 of 22 What happens to the fuse if the current exceeds its rated value, breaking the circuit? Melts 22 of 22
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