| ASSERTION: Reduction factor (K) of a tangent galvanometer helps in reducing deflection to current. |
| REASON: Reduction factor increases with increase of current. |
A) If both assertion and reason are true and reason is the correct explanation of assertion.
B) If both assertion and reason are true and reason is not the correct explanation of assertion.
C) If assertion is true but reason is false.
D) If both assertion and reason are false.
E) If assertion is false but reason is true.
Correct Answer: C
Solution :
The reduction factor of tangent galvanometer is \[K=\frac{{{B}_{H}}}{G}={{B}_{H}}\times \frac{2a}{N{{\mu }_{0}}}\] Thus reduction factor of a tangent galvanometer depends upon the geometry of the coil. It increases with increase of radius and decreases with increase in number of turns of the Coil of the galvanometer.
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