Q64 / 90 · JEE Main 2023 (31 Jan Shift 2) · Physics

The number of turns of the coil of a moving coil galvanometer is increased in order to increase current sensitivity by 50%. The percentage change in voltage sensitivity of the galvanometer will be :

  • A
    100%
  • B
    50%
  • C
    75%
  • Correct answer
    D
    0%

Solution

Current sensitivity = Voltage sensitivity ×R

If current sensitivity is made 1.5 times, then R also increase 1.5 times.

Hence, voltage sensitivity =1.5× current sensitivity 1.5×R

= no change.

Hence, the correct answer is option: 'D'.

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