State the energy change which takes place when a magnet is moved inside a coil having a galvanometer at its ends. Name this phenomenon.

The strength of the induced potential difference depends on the relative speed between the coil and the magnet.

In the arrangement shown in the figure,there are two coils wound on a non-conducting cylindrical rod. Initially,the key is not inserted. Then the key is inserted and later removed. Then

What is a solenoid? Explain with the help of a figure how a solenoid behaves like a bar magnet.

Draw the pattern of magnetic field lines through and around a current-carrying circular loop of wire. How would the strength of the magnetic field produced at the centre of the circular loop be affected if: $(i)$ the strength of the current passing through this loop is doubled? $(ii)$ the radius of the loop is reduced to half of the original radius?

The magnetic field produced by a current in a straight wire has no poles.