Questions
Sensitivity of a moving coil galvanometer can be increased
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.
detailed solution
Correct option is A
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.Talk to our academic expert!
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A voltmeter has an internal resistance of 1000 Ω and gives full scale deflection when 2 V is applied across the terminals. Now a resistance of 4000 Ω is connected in series with it. Then it gives full scale deflection with
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