GEOLOGY

Detailed explanation-1: -A compass is a navigational instrument for determining direction relative to the Earth’s magnetic poles. It consists of a magnetized pointer (usually marked on the North end) free to align itself with Earth’s magnetic field.

Detailed explanation-2: -A compass has a magnetic needle that can rotate freely. When a compass is kept at a place, the magnetic needle aligns in a north-south direction. The red arrow of the compass needle is termed as the north pole and the other end as the south pole.

Detailed explanation-3: -Hence Compass uses the permanent Magnet. Option (B) is the correct answer. The materials which are strongly attracted to magnet collect ferromagnetic or ferromagnetic, like iron, nickel, Cobalt and their Alloys of rare metals can be Magnetized Permanently by placing with permanent magnets.

Detailed explanation-4: -This works because the Earth itself has a magnetic field which is similar to that of a bar magnet. The compass needle aligns with the Earth’s magnetic field direction and points north-south.

Detailed explanation-5: -Magnetic compasses consist of a magnetized needle that is allowed to rotate so it lines up with Earth’s magnetic field. The ends point to what are known as magnetic north and magnetic south.