Current Electricity

JEE Main level, single correct, medium

341 of 380

Question 341 of 380

The number of turns of the coil of a moving coil galvanometer is increased in order to increase current sensitivity by 5050%. The percentage change in voltage sensitivity of the galvanometer will be :

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Answer: (D) 00%

Current sensitivity == Voltage sensitivity ×R\times R
If current sensitivity is made 1.51.5 times, then RR also increase 1.51.5 times.
Hence, voltage sensitivity =1.5×current sensitivity1.5×R=\dfrac{1.5\times \text{current sensitivity}}{1.5\times R}
== no change.

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