A) strength of magnet
B) torsional constant of spring
C) number of turns of coil
D) area of coil
Correct Answer: B
Solution :
Current sensitivity of galvanometer \[\frac{\phi }{I}={{S}_{i}}=\frac{NBA}{k}\] Hence, to increase (current sensitivity \[{{S}_{P}}\]) (torsional constant of spring) k must be decrease.
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