Physics · Oct / Nov 2017 · Paper 11 · Question 33
Why are the metal casings of electrical appliances earthed?
- Ato complete the circuit
- Bto ensure the casing is not at a dangerous voltage
- Cto ensure the fuse blows when the current in the appliance is too large
- Dto protect the appliance from overheating
As printed in the paper
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Correct answer: B. to ensure the casing is not at a dangerous voltage
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