A MOVING COIL GALVANOMETER HAS A FULL-SCALE DEFLECTION OF 3A EQUIVALENT TO 30° DEFLECTION. THE SENSITIVITY OF THE INSTRUMENT IS

• A. 33.0
• B. 0.1
• C. 90.0
• D. 10.0 ✓

 

The answer to the question is: D. 10.0

A moving coil galvanometer is an instrument used to detect and measure small electric currents. The sensitivity of a galvanometer refers to the amount of deflection produced by a given amount of current. It is usually expressed in terms of the current required to produce full-scale deflection, or the angle of deflection for a given current.

The sensitivity (S) of a galvanometer can be calculated using the formula:

S = θ / I

Where:

S = Sensitivity

θ = Angle of deflection for full-scale current

I = Full-scale current

In this case, the full-scale deflection of the galvanometer is 30 degrees, equivalent to a full-scale current of 3A. To calculate the sensitivity, we can use the formula:

S = 30° / 3A

S = 10.0

Therefore, the sensitivity of the instrument is 10.0