1.

In a moving coil galvanometer, there is a coil of copper having number of insulated turns N, each of area A. The coil is suspended in a radial magnetic field B. The moment of inertia of the coil about its rotational axis is I. The scale divisions in the galvanometer are n and resistance of the coil is R. The voltage sensitivity of the galvanometer (in rad/volt) is

Answer»

`(pi)/(3R)`
`(3i_0R)/(pi)`
`(pi)/(3i_0R)`
`(pi)/(i_0R)`

Solution :VOLTAGE SENSITIVITY, `V_s=(theta)/(IR)=(pi//3)/(i_0R)=(pi)/(3i_0R)`


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