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: (a) (B) and (C) only (b) (C) and (D) only (c) (A) and (C) only (d) (B) and (D) only

Answer: (d). Current sensitivity (θ)/(I) = NBA/k. It increases with larger N, B, A and with smaller torsional constant k. (A) and (C) decrease it; (B) and (D) increase it. So the answer is (d) (B) and (D) only.

The current sensitivity of a galvanometer can be increased by: (A)… | JEE Main 2022 (28 Jul, Shift 1)

Q19JEE Main 2022 · 28 JUL · SHIFT 1Easy

Moving Coil Galvanometer, Ammeter & Voltmeter

The current sensitivity of a galvanometer can be increased by:

(A) decreasing the number of turns

(B) increasing the magnetic field

(D) decreasing the torsional constant of the spring

Choose the most appropriate answer from the options given below:

Show answer and solution

Answer: (d)

Current sensitivity $\frac{\theta}{I} = \frac{NBA}{k}$ .
It increases with larger $N$ , $B$ , $A$ and with smaller torsional constant $k$ .
(A) and (C) decrease it; (B) and (D) increase it.
So the answer is (d) (B) and (D) only.

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Moving Coil Galvanometer, Ammeter & Voltmeter question from JEE Main 2022 (28 Jul, Shift 1)

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