$A$ metal detector works on the principle of:

When a small magnet is allowed to fall through an aluminium pipe,it falls with an acceleration less than $g$. Why?

What should be the resistivity of materials used for electromagnets,and why?

When a bar magnet falls through a long hollow metal cylinder fixed with its axis vertical,the final acceleration of the magnet is

We can reduce eddy currents in the core of a transformer by:

$A$ spherical insulating ball and a spherical metallic ball of the same size and mass are dropped from the same height. Choose the correct statement out of the following (Assume negligible air friction).