A moving coil galvanometer has a full-scale deflection of 3A equivalent to 30o deflection. The sensitivity of the instrument is

Answer Details

The sensitivity of a moving coil galvanometer is the deflection produced per unit current passing through it. In this question, we are given that the full-scale deflection of the galvanometer is 30° which is equivalent to 3A. So, the sensitivity of the galvanometer can be calculated as follows:
Sensitivity = (Full-scale deflection) / (Current producing it)
Sensitivity = 30° / 3A = 10°/A
Therefore, the sensitivity of the instrument is 10.0. Option (D) is the correct answer.