Sensitivity of a moving coil galvanometer can be increased
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a
by increasing the number of turns.
b
by decreasing the strength of the radial magnetic field.
c
by decreasing the area of the coil.
d
by increasing the couple per unit twist of the suspension fiber.
answer is A.
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Detailed Solution
Sensitivity of a moving coil galvanometer is θi=nABC where n is the no of turns, B is the strength of the radial magnetic field A is the area of the coil and C is the couple per unit twist of the suspension fiber.