Electromagnetic...

The resistance in the following circuit is increased at a particular instant. At this instant the value of resistance is $$10 \Omega$$. The current in the circuit will be now

The current through a $$4.6\, H$$ inductor is shown in the following graph. The induced emf during the time interval $$t = 5$$ milli-sec to $$6$$ milli-sec will be

A horizontal loop abcd is moved across the pole pieces of a magnet as shown in fig. with a constant speed v. When the edge ab of the loop enters the pole pieces at time $$t = 0$$ sec. Which one of the following graphs represents correctly the induced emf in the coil

For previous objective, which of the following graphs is correct

The magnetic induction at any point due to a long straight wire carrying a current is 

If 1 A of current is passed through CuSO $$_{4}$$ solution for 10 seconds,then the number of copper ions deposited at the cathode will be about

The device that does not work on the principle of mutual induction is

In the following figure, the magnet is moved towards the coil with a speed v and induced emf is e. If magnet and coil recede away from one another each moving with speed v, the induced emf in the coil will be

If a conducting rod moves with a constant velocity $$ v $$ in a magnetic field, emf is induced between both its ends if:

What would be the coefficient of self-inductance of a coil $$ 100 turns, $$ if $$ 5 A $$ current flows through it? The magnetic flux is of $$ 5 \times 10^{3} $$ Maxwell.