# GEOLOGY

## EARTH SCIENCE

### MAGNETISM

 Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What can demagnetize a magnet?
 A high altitudes B high temperatures C low altitudes D low temperatures
Explanation:

Detailed explanation-1: -At around 80 °C, a magnet will lose its magnetic force and it will become demagnetized permanently if exposed to this temperature for a period, or if heated above its Curie temperature. Heat the magnet even more, and it will melt, and eventually vaporize.

Detailed explanation-2: -When heated above 176° Fahrenheit (80° Celsius), magnets will quickly lose their magnetic properties. The magnet will become permanently demagnetized if exposed to these temperatures for a certain length of time or heated at a significantly higher temperature (Curie temperature).

Detailed explanation-3: -A magnet subjected to heat experiences a reduction in its magnetic field as the particles within the magnet are moving at an increasingly faster and more sporadic rate. This jumbling confuses and misaligns the magnetic domains, causing the magnetism to decrease.

Detailed explanation-4: -Heating magnet to very high temperature. Dropping the magnet frequently. Hammering the magnet repeatedly. Bringing the magnet in contact with the like poles of other magnets repeatedly.

Detailed explanation-5: -Heating to a high temperature. Hammering repeatedly. Passing alternating current through a coil around the magnet keeping it in the eastward direction.

There is 1 question to complete.