List of top Physics Questions on Electromagnetic induction

A metal plate can be heated by

1 henry =

The potential across a generator is 125V when it is delivering 10A. When it delivers 30A the potential is 120V. What are the resistance of armature and induced e.m.f. ?

A metallic rod of $1 \,m$ length is rotated with a frequency of $50$ revolution per second, with one end hinged at the centre and the other end at the circumference of a circular metallic ring of radius $1\, m$ about an axis passing through the centre and perpendicular to the plane of the ring. $A $ constant uniform magnetic field of $1 \,T$ parallel to the axis is present everywhere. The emf between the centre and the metallic ring is

A copper disc of radius $ 0.1 \,m $ is rotated about its centre with $ 20\, rev/s $ in a uniform magnetic field of $ 0.1\, T $ with its plane perpendicular to the field. The emf induced across the radius of the disc is:

The magnetic flux linked with a coil of $N$ turns of area of cross section $A$ held with its plane parallel to the field $B$ is