The property of coil by which a counter e.m.f. is induced in it when the current through the coil changes is known as__________?

Related Mcqs:

Mutually inductance between two magnetically-coupled coils depends on____________?

A. permeability of the core B. the number of their turns C. cross-sectional area of their common core D. all of the above...

In case of an inductance, current is proportional to___________?

A. voltage across the inductance B. magnetic field C. both A. and B. D. neither (A) nor (B)...

An average voltage of 10 V is induced in a 250 turns solenoid as a result of a change in flux which occurs in 0.5 second. The total flux change is____________?

A. 20 Wb B. 2 Wb C. 0.2 Wb D. 0.02 Wb...

An alternating current or voltage________________?

A. fluctuates off and on B. varies in magnitude alone C. changes its direction again and again D. changes its magnitude continuously and reverses its direction of flow after regularly recurring intervals....

An aeroplane of wingspan 10m flies from the equator towards the North Pole. The wings are perpendicular to the vertical component of the earths magnetic field (B = 4×10-5T). At maximum speed an emf of 96mV is induced across the wing tips. The maximum speed of the aeroplane is____________?

A. 150msec-1 B. 384msec-1 C. 38.4msec-1 D. 200msec-1...