Electromagnetic...

A wire of fixed length is wound on a solenoid of length l and radius r. Its self inductance is found to be L. Now, if same wire is wound on a solenoid of length $$\dfrac{l}{2}$$ and radius $$\dfrac{r}{2}$$, then self inductance will be

Electro motive force induced by motion of conductor across magnetic field is called

A cylindrical magnet is kept along the axis of a circular coil. On rotating the magnet about its axis. the coil will have induced in it

Magnetic flux in the circuit containing a coil of resistance 2 ohm changes from 2.0 wb to 10 wb in 0.2 sec. the charge passed through the coil in this time is 

A magnetic field of flux density $$10 T$$ acts normal to a coil of $$50$$ turns having $$100$$ $$cm^2$$  area. The e.m.f. induced if the coil is removed from the magnetic field in $$0.1$$ seconds is:

A constant current $$I_{0}$$ is passing through a long straight wire (shown in figure).
A rectangular loop of total resistance $$R$$ is moving parallel to the wire. Then:

When current changes from $$13\ A$$ to $$7\ A$$ in $$0.5\ sec$$ through a coil, the emf induced is $$3\times 10^{-4}\ V$$. The coefficient of self induction is:

The magnetic flux $$\phi$$ (in weber) in a closed circuit of resistance $$10\ ohm$$ varies with time $$t$$ (in second) according to equation $$\phi=6t^{2}-5t+1$$. The magnitude of induced current at $$t=0.25\ s$$ is:

Self inductance of coil measures

Which type of current can be obtained from an electric generator?