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Megger is also used for ________

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Megger is also used for ________

(a) providing additional e.m.f

(b) bridge balance

(c) testing insulation resistance

(d) controlling the temperature

I had been asked this question in an internship interview.

This question is from Megger in chapter Measurement of Resistance of Electrical Measurements

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Right answer is (c) testing insulation resistance

To explain I would say: A null detector is used to balance the bridge. Additional e.m.f can be provided to a circuit by increasing the magnitude of the voltage source. Megger is used for testing the insulation resistance of cables.

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