In suspended coil type M.C.G. the coil is suspended in radial magnetic field by thin fibre of phosphor bronze because

A : Torque on the coil is the maximum, when coil is suspended in a radial magnetic field. R : The torque tends to rotate the coil on its own axis.

Assertion: Torque on the coil is the maximum, when coil is suspended in a radial magentic field. Reason: The torque tends to rotates the coil on its own axis.

(A) : Torque on the coil is always maximum, when coil is suspended in a radial magnetic field. (R) : Torque depends upon the magnitude of the applied magnetic field.

(A) : Torque on the coil is always maximum, when coil is suspended in a radial magnetic field. (R) : Torque depends upon the magnitude of the applied magnetic field.

Obtain an expresion for average power dissipated in a purely resistive A.C. circuit. Define power factor of the circuit and state its value for purely resistive A.C. circuit. A rectangular coil of a moving coil galvanometer contains 50 turns each having area 12cm^(2) . It is suspended in radial magnetic field 0.025 Wb//m^(2) by a fibre of twist constant 15xx10^(-10)N-m//degree . Calculate the sensitivity of the moving coil galvanometer.