JAMB - Physics (1980 - No. 5)
A magnet is similar to a bipolar charged system in that
it consists of two opposite poles - the north and south poles
the earth's magnetic field has a south pole near the geographical north pole and a north pole near the geographical south pole
the force of attraction and repulsion between opposite and between like poles obeys a law for electrostatic charges
A and B only
A and C only
Giải thích
A magnet is similar to a bipolar-charged system in that it has two distinct poles: a north pole and a south pole. Like a bipolar-charged system, which has positive and negative charges, a magnet exhibits opposite magnetic forces. The north pole of one magnet attracts the south pole of another magnet, while like poles repel each other.