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The coil of a moving coil galvanometer h...

The coil of a moving coil galvanometer has an effective area of 4xx10^(-2)m^(2)`. It is suspended in a magnetic field of `5xx10^(-2)` Wb `m^(-2)`. If deflection in the galvanometer coil is 0.2 rad when a current of 5 mA is passed through it, then

A

torsional constant is `5xx10^(-5)N-m" rad"^(-1)`

B

current sensitivity is `40 rad` `A^(-1)`

C

torsional constant is `3xx10^(-3)` `N-m` `" rad"^(-1)`

D

current sensitivity is `40 deg` `A^(-1)`

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The correct Answer is:
A, B
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