Question

Two galvanometers 'G1' and 'G2' require 2 mA and 3 mA respectively to produce the same deflection. Then

• A. G1 and G2 are equally sensitive
• B. G1 is more sensitive than G2.
• C. G1 is less sensitive than G2.
• D. Sensitivity of G2 is \( \frac{3}{2} \) times that of G1.

Hint:

In comparing the sensitivity of two instruments, the one requiring less current for the same deflection is more sensitive.

Answer 1

The Correct Option is B

Step 1: Understanding Sensitivity.
Sensitivity of a galvanometer is defined as the amount of current required to produce a unit deflection. The lower the current required, the more sensitive the galvanometer is.
Step 2: Comparing the Galvanometers.
- G1 requires 2 mA to produce a deflection. - G2 requires 3 mA to produce the same deflection. Since G1 requires a smaller current, it is more sensitive.
Step 3: Conclusion.
Therefore, G1 is more sensitive than G2, which makes option (B) the correct answer.