Question

In a tangent galvanometer, a current of 1A is required to produce a deflection of 60° is:

• A. 3A
• B. 2A
• C. 1A
• D. 4A

Hint:

The current required to produce a deflection in a tangent galvanometer depends on the coil's properties and the deflection angle.

Answer 1

The Correct Option is A

Step 1: Tangent galvanometer principle
In a tangent galvanometer, the deflection is related to current by:
\( B = B_H \tan\theta \) The magnetic field produced by the coil is proportional to current:
\( B \propto I \) Thus,
\( I = k \tan\theta \) where \(k\) is the galvanometer constant.

Step 2: Required data
To calculate current numerically, values of \(B_H\) or calibration constant \(k\) are required along with \(\theta\).

Step 3: Conclusion
Since the required constants are not properly provided, the value \(I = 3A\) cannot be uniquely determined from the given relation.