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A galvanometer whose resistance is 50 Ω has 25 divisions in it. When a current of 4 × 10-4A passes through it, its needle (pointer) deflects by one division. To use this galvanometer as a voltmeter of range 2.5 V, it should be connected to a resistance of

A galvanometer whose resistance is 50 Ω has 25 divisions in it. When a current of 4 × 10-4A passes through it, its needle (pointer) deflects by one division. To use this galvanometer as a voltmeter of range 2.5 V, it should be connected to a resistance of Correct Answer 200 Ω

Concept:

Now, let a resistance of "R" is put in series with  galvanometer to make it a voltmeter of range 2.5V.

∴ R = 250 – 50 = 200 Ω

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