Electromagnetic...

In an iron cored coil the iron core is removed so that the coil becomes an air cored coil. The inductance of the coil will

The magnetic flux through a stationary loop with resistance R varies during interval of time T as f = at (T ^_ t). The heat generated during this time neglecting the inductance of loop will be

The dimensions of permeability of free space can be given by

A closed planar wire loop of area A and arbitrary shape is placed in a uniform magnetic field of magnitude B, with its plane perpendicular to magnetic field. The resistance of the wire loop is R. The loop is now turned upside down by 180 °so that its plane again becomes perpendicular to the magnetic field. The total charge that must have flowen through the wire ring in the process is

A square coil ABCD is placed in x-y plane with its centre at origin. A long straight wire, passing through origin, carries a current in negative z-direction. Current in this wire increases with time.The induced current in the coil is

Two identical coaxial circular loops carry a current i each circulating in the same direction. If the loops approach each other

In the arrangement shown in given figure current from A to B is increasing in magnitude. Induced current in the loop will

The north pole of a magnet is brought near a coil. The induced current in the coil as seen by an observer on the side of magnet will be

A metal sheet is placed in a variable magnetic field which is increasing from zero to maximum. Induced current flows in the directions as shown in figure. The direction of magnetic field will be -

A small conducting rod of length l, moves with a uniform velocity v in a uniform magnetic field B as shown in fig-