UPSC CDS 1 2022 GK Paper

Question : 4 of 120

Marks: +1, -0

Which one of the following statements is not correct?

An electric motor converts electrical energy into mechanical energy.
An electric generator works on the principle of electromagnetic induction.
The magnetic field at the centre of a long circular coil carrying current will be parallel straight lines.
A wire with a green insulation is usually the live wire of an electric supply.

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