1) What is a circuit? a) A path of electricity b) A path of power 2) Insulator a) Allows electricity to flow through it b) Does not allow electricity to flow through it 3) Conductor a) Allows electricity to flow through it b) Does not allow electricity to flow through it 4) What are the three wires in a plug? a) Neutral b) Central c) Earth d) Venus e) Live f) Mars 5) What is an alternating current a) the way current flows to and fro or forward and backward in a circuit b) the way the current stops 6) what colour is the live wire? a) brown b) blue c) green/yellow 7) what colour is the neutral wire? a) brown b) blue c) green/yellow 8) what colour is the earth wire? a) brown b) blue c) green/yellow 9) why is the earth wire called a safety wire? a) it helps to prevent electric shock b) it helps to prevent water 10) Why is the pin of the earth wire longer than the two other pins?  a) So it gets connected to the earth terminal earlier than the live and neutral pins, so as to ensure the safety of the user b) to be faster 11) select all the types of cables a) metal clad cable b) armoured cable c) non metal clad cable  d) underground feeder cable e) feeder cable 12) Explain how a series circuit works a) If one component fails, all the others fail. b) If one component fails, the rest will still work 13) Explain how a parallel circuit works a) If one component fails, all the others fail. b) If one component fails, the rest will still work 14) Houses use _____________________________ circuits because they are more reliable? a) Series circuit b) Parallel circuits 15) What is a complete circuit? a) Complete path for the flow of electricity. b) Incomplete path for the flow of electricity 16) What is a complete circuit? a) Complete path for the flow of electricity. b) Incomplete path for the flow of electricity

NAEEMA SCIENCE

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