A square coil of side `25cm` having `1000` turns is rotated with a uniform speed in a magnetic field about axis perpendicular to the direction of the field. At an instant `t`, the e.m.f. induced in the coil is `e=200 sin 100pi t`. The magnetic induction is

A coil is rotated in a uniform magnetic field about an axis perpendicular to the field. The emf induced in the coil would be maximum when the plane of coil is :

A coil is rotated in a uniform magnetic field about an axis perpendicular to the field. The emf induced in the coil would be maximum when the plane of coil is :

A circular coil of radius 0.2 m having 2000 turns rotates with a uniform speed of 100 rpm in a uniform magnetic field of 0.2 T. The r.m.s. value of the induced voltage is

A coil is rotated with constant angular speed in a uniform magnetic field about an axis that is perpendicular to the field. Tell, with reason, if the following statement is true– “The emf induced in the coil is maximum at the instant the magnetic flux through the coil is zero”.

A rectangular coil of area A , having number of turns N is rotated at 'f' revoluation per second in a uniform magnetic field B , the field being perpendicular to the coil. Prove that maximum emf induced in the coil is 2pifNBA .

A rectangular coil is placed in a region having a uniform magnetic field B perpendicular to the plane of the coil. An emf will not be induced ion the coil if the

A rectangular coil is placed in a region having a uniform magnetic field B perpendicular to the plane of the coil. An emf will not be induced ion the coil if the