In an A.C. generator, the coil has an area 300 `cm^2`and 25 turns rotates with an angular speed of `40 rad//s`. The magnetic induction is 0.05 T. Obtain the maximum and peak value of voltage generated in it.

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 magnitude 3.0 xx 10^-2 T. Obtain the maximum and average emf induced in the coil. If the coil forms a closed loop of resistance 10 ohm, calculate the maximum value of current in the coil Calculate the average power lose due to the Joule heating .Where does this power come from ?

A coil of 100 turns each of area 0.12m^2 is rotated with constant speed 62.8rad/s in uniform magnetic field of induction 0.02 tesla about an axis in the plane of coil and perpendicular to the direction of field. Calculate maximum value of induced e.m..f.in the coil.

A coil of 100 turns each of area 0.1 m^2 is rotated at constant speed of 300 r.p.m. in a uniform magnetic field of induction 0.02 Wb//m^2 about an axis in the plane of the coil and perpendicular to the direction of the coil.Calculate the maximum value of induced e.m.f.

A coil of 50 turns each of area 0.12m^2 is rotated at constant speed of 600 r.p.m. in uniform magnetic field of induction 0.02 tesla about an axis in the plane of coil and perpendicular to direction of field.Calculate maximum e.m.f. induced in the coil.

A wheel has na angular acceleration of 3.0 rad//s^2 and an initial angular speed of 2.00rad/s.In a time of 2 s, it has rotated thorugh and angle (in radian ) of

A circular coil of 500 turns and area of 0.5 cm^2 carries a current of 10 A. The magnetic moment associated with it_______.

A coil of effective area 10m^2 is placed at right angles to a magnetic field of induction 0.05 T. Find the induced emf in the coil if just the magnitude of the field is changed to 0.03T in 0.2s.

A coil of area 0.75 m^2 and 1000 turns is kept perpendicular to a magnetic field of 0.15 Wb//m^2 . Calculate the change in magnetic flux through the coil when it isrotated through an angle of 30^@ about a diameter.If the time taken for the rotation is0.5s.What is the average value of e.m.f.induced in the coil?

A coil of 10^3 turns each of area 100 cm^2 rotateswith speed of 100 r.p.m. about an axis in its plane and perpendicular to uniform field of induction 36 xx 10^-2 Wb//m^2 . Find the peak and e.m.f. value of the induced e.m.f. in the coil.

A light meter rod has two point masses each of 2 kg fixed at its ends. If the system rotates about its centre of mass with an angular speed of 0.5 rad /s^2 ,find its rotational K.E.