Question

A galvanometer has a deflection of 25 divisions for a current of 0.1 A flowing through it. Then the current sensitivity of the galvanometer is

• A. 25 div/A
• B. 250 div/A
• C. 2.5 div/A
• D. 0.25 div/A

Hint:

The current sensitivity of a galvanometer indicates how much the deflection changes per unit of current. Higher sensitivity means smaller currents cause larger deflections.

Answer 1

The Correct Option is B

Current sensitivity of a galvanometer is defined as the number of divisions per unit current. The current sensitivity \( S \) is given by: \[ S = \frac{\text{deflection}}{\text{current}} \] Given that the deflection is 25 divisions for 0.1 A, we have: \[ S = \frac{25}{0.1} = 250 \, \text{div/A} \] Thus, the current sensitivity of the galvanometer is \( \boxed{250 \, \text{div/A}} \).