The current sensitivity of a moving coil galvanometer can be increased by-

A. Decreasing the magnetic field
B. Increasing the number of turns
C. Increasing the area of the coil
D. Inserting a soft iron core in the coil
E. Decreasing the area of the coil

Choose the correct answer from the options given below:

B, C, D Only

The correct answer is Option (2) - B, C, D Only

The current sensitivity of a galvanometer is -

$\frac{θ}{I}=\frac{nBA}{K}$

where,

θ → Deflection

I → Current

n → Number of turns

B → Strength of Magnetic field

A → Area of coil

B. Yes, by increasing the number of turns in coil.

$⇒S∝N$

C. Yes, by increasing the area of the coil

$⇒S∝A$

D. When a soft iron core inserted, the strength of magnetic field increases.

$⇒S∝B$