Assertion: Reduction factor (K) of a tangent galvanometer helps in reduction to current.
Reason: Reduction factor increases with increase of current.

Options

A. If both assertion and reason are true and reason is the correct explanation of assertion.
B. If both assertion and reason are true but reason is not the correct explanation of assertion.
C. If assertion is true but reason is false.
D. If assertion and reason both are false.

Answer

C

Explanation

The reduction factor of tangent galvanometer is
`K=B_(H)/G=B_(H)xx(2r)/(nmu_(0))`
Thus reduction factor of a tangent galvanometer depends upon the geometry of its coil. It increases with increase of radius and decreases with increase in number of turn of the coil of the galvanometer.