Physics · 2019
JEE Main · 12 January 2019, Shift 2 · Q18
A galvanometer, whose resistance is 50 ohm, has 25 divisions in it. When a current of 4 × 10^-4 A passes through it, its needle (pointer) deflects by…
A galvanometer, whose resistance is $\displaystyle 50$ ohm, has $\displaystyle 25$ divisions in it. When a current of $\displaystyle 4 \times 10^{-4} \mathrm{~A}$ passes through it, its needle (pointer) deflects by one division. To use this galvanometer as a voltmeter of range $\displaystyle 2.5$ V , it should be connected to a resistance of :
Official answer
(4)
$\displaystyle 200$ ohm
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JEE Main 2019 Physics question, with the answer from NTA’s final answer key. Where our answers come from.