Electricity 0.0 / 5 ? PhysicsElectricityIGCSEEdexcel Created by: EllieCreated on: 06-05-13 10:48 What wire is brown? Live wire 1 of 23 What wire is Blue? neutral wire 2 of 23 What wire is green/yellow? earth wire 3 of 23 What are the metal parts of a plug made of? copper or brass 4 of 23 What is the cable insulation made out of an why? plastic/rubber its flexible 5 of 23 What does the live wire do? alternates between a positive and a negative voltage 6 of 23 What does the neutral wire do? stay at 0 volts 7 of 23 Why is a broken plug a hazard? live parts are exposed 8 of 23 How does a fuse work? a serge in current blows/melts the fuse which cuts off the live suppl 9 of 23 How does a circuit breaker work? a serge in current breaks the circuit by opening a switch 10 of 23 What is an advantage of a circuit breaker over a fuse? they can be reset 11 of 23 How does temperature effect resistance? the higher the temperature the higher the resistance 12 of 23 How must voltmeters be placed in a circuit? In parallel 13 of 23 What is meant by alternating current (AC)? the current constantly changes direction 14 of 23 What is meant by direct current (DC)? the current flows in the same direction 15 of 23 How do LED's work? they emit light when current flows through them in a forward direction 16 of 23 How are components connected in a series circuit? in a line 17 of 23 Give an example of something connected in series fairy lights 18 of 23 What is the problem in connecting something in series? If you disconnect one component the circuit breaks and they all stop 19 of 23 In series circuits the current is.... the same everywhere 20 of 23 How are components connected in parallel circuits? separately in parallel 21 of 23 What are always connected in series? Ammeters 22 of 23 What are always connected in parallel? voltmeters 23 of 23
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