Derive an expression for the current required to produce a steady angular deflection…
PHYSICS · Subjective · CBSE · Physics · Moving Charges and Magnetism · Moving Charges and Magnetism
Problem
Derive an expression for the current required to produce a steady angular deflection ϕ in a moving-coil galvanometer whose coil has N turns, area A, is situated in a uniform magnetic field B, and is suspended by a spring that exerts a restoring torque kϕ when the coil is deflected by ϕ.