JEE MAIN - Physics (2022 - 28th July Morning Shift - No. 11)

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 :

(B) and (C) only

(A) and (C) only

(B) and (D) only

$$NiAB = k\theta $$

$$ \Rightarrow {\theta \over i} = {{NAB} \over k}$$

$$\Rightarrow$$ Sensitivity increases if $$B \uparrow $$ and $$k \downarrow $$