Magnetism
Mark out the correct options.
State three ways of demagnetizing a magnet.
A magnet can be demagnetized in the following ways
1. rough handling
2. hammering the magnet several times.
3. passing an alternating current around the magnet.
4. dropping the magnet on the floor several times.
5. heating the magnet to a very high temperature.
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If a diamagnetic substance is brought near north and south pole of a bar magnet, it is
If a magnetic substance is kept in a magnetic field then which of the following substance is thrown out?
Among the following properties describing diamagnetism identify the property that is wrongly stated.
A small rod of bismuth is suspended freely between the poles of a strong electromagnet. It is found to arrange itself at right angles to the magnetic field. This observation establishes that bismuth is :
An example of a diamagnetic substance is
The universal property of all substances is
A diamagnetic material in a magnetic field moves
A frog can be levitated in a magnetic field produced by a current in a vertical solenoid placed below the frog. This is possible because the body of the frog behaves as :
Answer the following question What happens when a diamagnetic substance is placed in a varying magnetic field?