If a bar magnet is accidentally broken into three pieces as shown in the diagram above, the polarities of P and Q respectively, are

An inductor of inductance 10H carries a current of 0.2A. Calculate the energy stored in the inductor

calculate the inductance of an inductor whose reactance is one ohm at 50 Hz.

Borh's theory provides evidence for the

A nuclide \(^{202}_{84} Y\) emits in succession an \(\alpha-particle\) and a \(\beta-particle\). The atomic number of the resulting nuclide is