A moving coil galvanometer has 100 turns and each turn has an area `2.0 cm^2`. The magnetic field produced by the magnet is `0.01 T`. The deflection in the coil is `0.05` radian when a current of `10 mA` is passed through it. Find the torsional constant of the suspension wire.

Explanation

To find the torsional constant (K) of the suspension wire in a moving coil galvanometer, we can use the relationship between the torque acting on the coil, the current flowing through it, and the deflection angle. The formula we will use is:

\[ \tau = n \cdot B \cdot I \cdot A \cdot \sin(\theta) \]

Where:
- \(\tau\) is the torque,
...