Question

Assertion: The tangent galvanometer can be made more sensitive by increasing the number of turns of its coil.
Reason: Current through galvanometer is proportional to the number of turns of coil.
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 1

Correct Answer - B
In tangent galvanometer the current through the coil is given `I=(2r)/(nmu_(0)).B_(H) tan thetaimplies tan theta prop n//r`
i.e., by reducing its radius or by increasing number of turns of coil we can increase the sensitivity of tangent galvanometer.