Question

The unit of reduction factor of tangent galvanometer:

• A. Gauss
• B. Ampere
• C. Radian
• D. None Of These

Answer 1

The correct option is B

Ampere

The explanation for the correct option:

In the case of option B,

1. A traditional tool for measuring tiny electric currents is the tangent galvanometer. It is made up of an insulated coil of copper wire wound around a non-magnetic frame. The tangent law of magnetism serves as the foundation for how it operates. A magnetic field (B) is created at the center of the circular coil when a current is run through it in a direction perpendicular to the coil's plane.
2. The tangent galvanometer's reduction factor is equal to current, and the unit of current is ampere.
3. The current through tangent galvanometer is given by $I=K\tan \theta$. Where I is current and K is the reduction factor of the tangent galvanometer
4. It can be seen from the equation that the unit of current is ampere and the tangent is dimensionless. Hence, the unit of reduction factor of the galvanometer is ampere.

The explanation for the incorrect option:

1. The reduction factor of the tangent galvanometer is equal to the current, and the unit of current is ampere.
2. The gauss is the unit of magnetic induction in the centimeter-gram-second system and the radian is the unit of angle measure.

Hence, Option B is correct.