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Magnetisation and demagnetisation are considered physical changes because they involve a change in the arrangement of magnetic domains within a material without altering its chemical composition. When a material is magnetised, its magnetic domains align in a particular direction, while demagnetisation causes them to return to a random orientation. These processes do not involve any chemical reactions or formation of new substances, reinforcing their classification as physical changes.
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Why is magnetisation of iron a physical change?
Magnetization of iron is considered a physical change because it involves the alignment of magnetic domains within the material without altering its chemical composition. When iron is magnetized, its physical properties, such as its magnetic field, change, but the structure and identity of the iron remain intact. This means that the process is reversible; demagnetizing the iron will restore it to its original state.
Is it a physical change chemical change when salt dissolves in water?
Physical
Which is A change in size shape or state of matter?
a change in size, shape or the state of matter is a physical change. True for A+.
Is volume a physical or a chemical change?
Volume is a physical quantity not a change. However CHANGE in volume is a physical change.
Is carving plastic a physical change or chemical change?
physical change
How do you determine if the motor starters are properly earthed?
by magnetisation of no voltage coil
Is crumple a chemical change or physical change?
Crumple is a physical change.
What is reversal of magnetisation of steel core?
look up motor polling on the net.
Is magnetisation the same as magnetism?
Magnetization is the process of inducing magnetism in a paramagnetic metal.
Is it a physical change chemical change when salt dissolves in water?
Physical
Which is A change in size shape or state of matter?
a change in size, shape or the state of matter is a physical change. True for A+.
Is volume a physical or a chemical change?
Volume is a physical quantity not a change. However CHANGE in volume is a physical change.
Is carving plastic a physical change or chemical change?
physical change
Is mowing the lawn a chemical change or physical change?
I Physical Change.
Is painting a door a physical or chemical change?
Physical change of the paint, not the door.
Is recycling paper an example of a physical or chemical change?
physical change physical change
When sandpaper smooths a piece of wood what kind of change is it?
this is a physical change
