Electromagnetic...

The phenomenon of producing an emf in a circuit whenever the magnetic flux linked with a coil changes is ................................

Which of the following electrical devices works on the principle of electro-magnetic induction ?

$$A, B$$ and $$C$$ are the three coils of conductor having different number of turns, wound around a soft iron ring as shown in the figure. Ends of coils $$B$$ and $$C$$ are connected to the galvanometers. The observation that can be made when ends of coil $$A$$ are connected to an A.C. source is

For a current carrying inductor, emf associated in $$20mV$$. Now, current through it changes from $$6A$$ to $$2A$$ in $$2s$$. The coefficient of mutual inductance is 

A solenoid $$30 cm$$ long is made by winding $$2000$$ loops of wire on an iron rod whose cross-section is $$1.5{ cm }^{ 2 }$$. If the relative permeability of the iron is $$6000$$. What is the self-inductance of the solenoid?

Pick out the wrong statement.

Two coils have a mutual inductance $$0.55H$$. The current changes in the first coil according to equation $$I={ I }_{ 0 }\sin { \omega t }$$.
where, $$ { I }_{ 0 }=10A$$ and $$\omega =100\pi { rad }/{ s }$$.
The maximum value of emf in the second coil is

The phenomenon of producing an emf in a circuit whenever the magnetic flux linked with a coil changes is ________.

In the figure shown, the magnetic field induction as the point $$O$$ will be

Two Circular cells can be arranged in any of the three following situations as shown in figure. Their mutual inductance will be Maximum in which arrangement ?