SSC JE Electrical Engineering 2017 Set 3 Paper

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Question : 190 of 200

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A contactor coil is designed for 220V, D.C. What happens if it is connected to 220V, A.C. ?

A too large current is drawn by the coil and it is destroyed
A too small current is drawn by the coil and the operation of the contactor is no longer certain
The permanent magnet of the magnetic system is demagnetized
The coil insulation is quickly damaged by the alternating voltage

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