Verified Solution • 2025–26 Session moderate

QJEEM22Ph5a18: JEE Main 2022 Physics - Class 12 JEEM22Ph5a18 Solution: The current sensitivity of a galvanometer can be increased by : …

The current sensitivity of a galvanometer can be increased by :

(A) decreasing the number of turns

(B) increasing the magnetic field

(C) decreasing the area of the coil

(D) decreasing the torsional constant of the spring

Choose the most appropriate answer from the options given below :

Multiple Choice Options

  • A (B) and (C) only
  • B (C) and (D) only
  • C (A) and (C) only
  • D (B) and (D) only

Step-by-Step Verified Solution

NiAB=kθNiAB = k\theta

⇒θi=NABk\Rightarrow {\theta \over i} = {{NAB} \over k}

⇒\Rightarrow Sensitivity increases if B↑B \uparrow and k↓k \downarrow

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