The Curie temperature of a ferromagnetic material is best described as the temperature:
Aat which its magnetic poles completely reverse polarity
Bat which the material physically melts into a liquid
Cat which its magnetic domains reach their largest size
Dabove which the material can no longer be magnetized
Answer & Solution
Correct answer: D. above which the material can no longer be magnetized
1. Ferromagnetic materials like iron owe their strong magnetism to aligned microscopic domains.
2. The text defines this threshold directly: "There is a well-defined temperature for ferromagnetic materials, which is called the Curie temperature, above which they cannot be magnetized."
3. So the Curie temperature is a loss-of-magnetism threshold, not a melting point, a pole-reversal point, or a point of maximum domain size.
4. Above this temperature, thermal agitation randomizes the domains faster than an external field can align them.
_Source: OpenStax Physics Ch 20 "Magnetism", p.673 §20.1 Magnetic Fields, Field Lines, and Force_
Related questions
All magnetic effects are explained using currents rather than poles because monopoles are:A charge moving parallel to a magnetic field experiences a magnetic force that is:A ferromagnetic material becomes strongly magnetic when its domains are:Cutting a bar magnet in half produces two magnets rather than two monopoles because:The similarity noted between magnetic poles and electric charges is that unlike ones:A solenoid is described as a long coil of wire with:The magnitude of the magnetic force on a moving charge depends on the angle between the fiThe magnetic force on a charge moving in a magnetic field is often called the: