Electromagnetic...

What will be the self inductance of a coil of 100 turns if a current of 5 A produces a magnetic flux $$5\times 10^{-5}$$ Wb?

The current in a coil changes from $$1 \ mA$$ to $$5 \ mA$$ in $$4$$ milli second. If the coefficient of self-induction of the coil is $$10\ mH$$ the magnitude of the "self-induced" emf is:

An airplane with a wing span of $$40m$$ changes its pitch so that it is flying $$100m/s$$ in an area of the Earth's magnetic field that is perpendicular to the plane and equal to $$5.010^{5}T$$.
What is the emf induced between the wing tips? Assume that the plane was previously flying parallel to the earths magnetic field.

A $$2 cm$$ long bar slides along metal rails at a speed of $$1 {cm}/{s}$$ towards the right side. The  magnetic field inside the bar and rails is $$2 T$$, pointing out of the page. Find out the induced emf in the bar and rails?

Identify which of the following best describe the Mutual inductance?

When a voltage source that is inducing voltage into a large number of coils is disconnected, and a switch that is in series with the coils of wire is also opened, a spark is observed to jump across the switch terminals as the switch begins to open up. Identify the cause of this spark?

Fill in the blank.

As shown in above figure, a uniform magnetic field B, direction of magnetic field is outward of the plane of the page. Calculate the potential difference between point a and b if metal rod is pulled upward with constant velocity.

Magnitude of e.m.f produced in a coil, when a magnet is inserted into it does not depend upon 

An aeroplane is moving towards north horizontally with a speed of $$200 m/s$$ at a place where the vertical component of earths magnetic field is $$0.5\times { 10 }^{ -4 }$$ tesla. Then the induced e.m.f. set up between the tips of the wings of the plane if they are $$10 m$$ apart is: