Richard and Kakewa are using bar magnets in a science lesson. They begin to throw magnets on the floor. When they pick the bar magnets up they no longer work. The magnets have become what?
Answers
Answer:
demagnetised
because it loses its power when throw down or heated or hammered
Answer:
It becomes demagnetized because it loses the power to magnetize.
Explanation:
Demagnetization:-
The process used to destroy the magnetic properties of a magnet is called demagnetization.
For example: - A magnet heats up and then loses its magnetic properties.
In other words, the removal of magnetic force from a magnetic substance is called demagnetization.
So demagnetization means destroying or removing the magnetic properties of a magnetic substance.
Once a ferromagnetic material is magnetized, this magnetization remains theoretically indefinitely.
The magnetic material can be demagnetized using the following methods:
Heating the product above the Curie temperature.
Strong vibrations (hammer blows), can cause a slight reduction in magnetization due to the influence of the own magnetic field.
Demagnetization using an externally applied alternately decreasing magnetic field.
Moving the magnetic field by applying a magnetic field with the opposite polarity while reversing the polarity followed by stopping the field source. The magnetism in the component jumps to virtually zero point if the field setting is accurately measured. This method is known as knockdown demagnetization.
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