A circular coil of radius 8.0 cm and 20 turns rotates about its vertical diameter with an angular speed of 50 `s^(-1)` in a uniform horizontal magnetic field of magnitude `3 xx 10^(-2) T`. Obtain the maximum and average e.m.f. induced in the coil . If the coil forms a closed loop of resistance `10 Omega`, calculate the maximum value of current in the coil. Calculate the average power loss due to Joule heating.

(a) Draw a schematic diagram of an AC generator. Explain is working and obtain the expression for the instantaneous value of the emf in terms of the magnetic field B, number of turns N of the coil of area A rotating with angular frequency omega . Show how an alternating emf is generated by loop of wire rotating in a magnetic field. (b) A circular coil of radius 10 cm and 20 turns is rotated about its vertical diameter with angular speed of 50 rad s^(-1). in a uniform horizontal magnetic field of 3.0xx10^(-2)T . (i) Calculate the maximum and average emf induced in the coil. (ii) If the coil forms a closed loop of resistance 10 Omega , calculate the maximum current in the coil and the average power loss due to Joule heating.

A circular coil of area 300 cm ^(2) and 25 turns rotates about its vertical diameter with an angular speed of 40 s ^(-1) in a uniform horizontal magnetic field of magnitude 0.05 T . Obtain the maximum voltage induced in the coil .

A circular coil having 20 turns, each of radius 8 cm, is rotating about its vertical diameter with an angular speed of 50 rad//s in a uniform horizontal magnetic field of 30 mT. Obtain the maximum, average and rms value of e.m.f. induced in the coil. If the coil forms a closed loop of resistance 10 ohm, how much power is dissipated as heat

A circular coil of radius 8.0 cm and 20 turns is rotated about its vertical diameter with an angular speed of 50 rad s^(-1) in a uniform horizontal magnetic field of 3.0xx10^(-2) T. The maximum emf induced the coil will be _________ xx 10^( -2) volt (rounded off to the nearest integer).

A circular coil of radius 6 cm and 20 turns rotates about its vertical diameter with an angular speed of 40"rad"s^(-1) in a uniform horizontal magnetic field of magnitude 2xx10^(-2)T . If the coil form a closed loop of resistance 8 Omega , then the average power loss due to joule heating is

A circular coil of cross-sectional area 200 cm^(2) and 20 turns is rotated about the vertical diameter with angular speed of 50 rad//s in a uniform magnetic of 3.0 xx 10^(-2) T . Calculate the maximum value of current in the coil.