Current sensitivity of a moving coil galvanometer is 5 d i v / m A and its voltage sensitivity (angular…

Current sensitivity of a moving coil galvanometer is 5 div/mA and its voltage sensitivity (angular deflection per unit voltage applied) is 20 div/V. The resistance of the galvanometer is
  1. 250  Ω
  2. 25  Ω
  3. 40  Ω
  4. 500  Ω

Solution

θi=5010-3=5000,θV=20
⇒ θ/iθ/V=500010=250⇒Vi=R=250 Ω
(∵ Voltage sensitivity = current sensitivity Resistance)

Asked in: NEET 2018

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