JEE Main 2022 · 28 Jul · Shift 1 · Physics Q42

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PhysicsSingle correct+4 / -1Question 42 of 90

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 :

(B) and (C) only

(A) and (C) only

(B) and (D) only

Answer and worked solution

Official answer: D

Current sensitivity $\frac{NAB}k$ rises with B and with a smaller torsional constant k.

(D)

Topics:Moving coil galvanometer

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JEE Main 2022 · 28 Jul · Shift 1, Physics question 42