GEOLOGY

Detailed explanation-1: -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-2: -A hand compass (also hand bearing compass or sighting compass) is a compact magnetic compass capable of one-hand use and fitted with a sighting device to record a precise bearing or azimuth to a given target or to determine a location.

Detailed explanation-3: -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-4: -Speakers: Magnets in speakers are used to convert electric signal to sound signals. Microphones: Magnets in microphones are used to convert sound signal to electric signals. Electric motors: In electric motors, magnets are used to convert electric signal into a mechanical motion. More items