JEE Main 2019 Physics question
A galvanometer, whose resistance is 50 ohm, has 25 divisions in it. When a current of A 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:
Answer: (A)
Solution
= 0.01 A; R = 2.5/0.01 − 50 = 200 Ω (in series).