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A galvanometer coil 5 cm xx 2 cm with 20...

A galvanometer coil `5 cm xx 2 cm` with 200 turns is suspended vertically in a field of `5 xx 10^-2 T`. The suspension fibre needs a torque of `0.125 x10^-7 N -m` to twist it through one radian. Calculate the strength of the current required to be maintained in the coil if we require a deflection of `6^@`.

Text Solution

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`i=(k/(NBA))phi`
`=((0.125xx10^-7)(6)(pi/180))/(200xx5xx10^-2xx5xx2xx10^-4)`
`=1.3xx10^-7A`
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