GEOLOGY

Detailed explanation-1: -When two magnets are placed with their like poles facing each other, the lines of force are in opposite directions and hence like poles repel each other. When the unlike poles of a bar magnet face each other the magnetic lines of force are in the same direction and hence unlike poles attract each other.

Detailed explanation-2: -Every magnet has both a north and a south pole. When you place the north pole of one magnet near the south pole of another magnet, they are attracted to one another. When you place like poles of two magnets near each other (north to north or south to south), they will repel each other.

Detailed explanation-3: -Opposite poles of two different magnets repel each other.

Detailed explanation-4: -Unlike poles of different magnets attract each other; like poles repel each other. The magnetic force between a pole of one long bar magnet and that of another was described by an inverse square law as early as 1750.

Detailed explanation-5: -When two magnets are placed with their likepoles facing each other, the lines of force arein opposite directions and hence like poles repel each other.