If the number of turns in the coil of AC generator is doubled, area of the coil is halved and the coil rotates with same angular velocity. The change in induced EMF of the coil is ?

In the above question if the coil rotates with a constant angular velocity omega , the EMF induced in it

If number of turns in the coil is increased, how will brightness change ?

When the number of turns in a coil is doubled without any change in the length of the coil, its self-inductance becomes

The number of turns in the coil of an ac genrator is 5000 and the area of the coil is 0.25m^(2) . The coil is rotate at the rate of 100 "cycles"//"sec" in a magnetic field of 0.2W//m^(2) . The peak value of the emf generated is nearly

A coil of cross-sectional area A having n turns is placed in uniform magnetic field B. When it is rotated with an angular velocity omega , the maximum e.m.f. induced in the coil will be :

State the working of a.c. generator with the help of a labelled diagram. The coil of an a.c. generator having N turns, each of area A, is rotated with a constant angular velocity omega . Deduce the expression for the alternating e.m.f. generated in the coil. What is the source of energy generation in this device?

When current in a coil changes with time, how is the back e.m.f. induced in the coil related to it ?

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 coil is wound on a rectangular frame. Keeping the number of turns per unit length constant, if the linear dimensions of the coil are doubled then the coefficient of self induction of the coil will become.

At the centre of a fixed large circular coil of radius R a much smaller circular coil of radius r is placed .The two coils are concentric and are in the same plane .The larger coil carries a current I The smaller coil is set to rotate with a constant angular velocity omega about an axis along their common diameter .Calculate the emf induced in the smaller coil after a time t of its start of ratation