GEOLOGY

Detailed explanation-1: -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-2: -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-3: -When the like pole of two magnets comes close they repel each other because the direction of the line of force is opposite and when the opposite pole comes together they attract each other because the line of force points in the same direction.

Detailed explanation-4: -When opposite poles of the magnets approach, they attract each other. Any north-south combination will pull them together. But when two like poles come together, they push each other apart. Two north poles will not stick together.

Detailed explanation-5: -Like poles repel each other and unlike poles attract each other. Similarly, like charges repel each other and unlike charges attract each other.