If you strike a sharp edge of a metallic knife against the north pole of a bar magnet,it will induce a north pole.

Name four appliances wherein an electric motor,a rotating device that converts electrical energy to mechanical energy,is used as an important component. In what respect are motors different from generators?

If the key in the arrangement (Figure) is taken out (the circuit is made open) and magnetic field lines are drawn over the horizontal plane $ABCD$,the lines are

When an electric current flows through a conducting wire,what is produced in the region around it?

The induced electromotive force $(EMF)$ in a conducting coil does not depend on which of the following?

Give the factors on which the magnetic field produced by a current-carrying solenoid depends.