Electromagnetic...

Given below are the symbols of a few electronic components. Which of these components denote a variable inductor ?

In one second, a current of 10 A changes through a coil. The induced emf is 10V, then, self-inductance of the coil is 

.................. gave the principle of Electromagnetic Induction.

If a magnet is plugged into a coil, then the magnitude of induced emf does not depend upon:

The self-inductance of a long solenoid carrying current is independent of:

Which of the following does not have the same dimensions as the Henry?

Which device is used to produce electricity? Describe with a neat diagram.

The current in a coil of 0.4 mH coil increases by 250 mA in 0.1 seconds. The induced emf will be:-

A solenoid of inductance $$L$$ carrying a certain current is linked with a total magnetic flux $$\phi $$. Now it is connected to a condenser with which it shares half of its initial energy. The total flux now linked with the solenoid is:

A coil with $$100$$ turns has an inductance of $$0.05H$$ and $$0.02A$$ current is passed through it. Flux linked with the coil is