Derive an expression for current flowing through the galvenometer in terms of steady angular deflection of it's coil.
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Moving coil galvanometer is based on the fact that when a current carrying coil is placed in magnetic field it experiences a torque.
This torque is counter balanced by a spring system and deflection in that spring is proportional to current because it measure the torque which is proportional to the current.
I=
NBA
kθ
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