magnetic Materials

Magnetic succeptibility for diamagnets are

• large and positive

• small and positive

• very small and negative

• very large and negative

examples of paramagenet s

• gold

• iron

• platinum

• zink

Succeptibility of ferroelectric materials are

• large and positive

• small and positive

• very large and positive

• very small and negative

When a ferromagnetic substance is magnetized small changes in dimensions occur. Such a phenomenon is known as

• magnetostriction

• magnetic hysteresis

• magnetic expansion

• magneto-calorisation

Magnetic susceptibility in diamagnetic material is

• Neutral

• Negative

• Positive

• Zero

Hard ferrites are used for making

• Electrical machinery

• Transformer cores

• Light weight permanent magnet

• High frequency equipment

Above Curie point

• a ferromagnetic material becomes paramagnetic

• a ferrite becomes an insulator

• a insulating material becomes a ferrite

• A diamagnetic material becomes a paramagnetic material.

Diamagnetic: Copper:: Ferromagnetic:

• Iron

•  Lead

• Air

• Water

Permanent magnetic dipoles are absent in material

• paramagnetic

• ferromagnetic

• ferrimagnetic

• diamagnetic

Which type of materials are used for making permanent magnets due to their ability to maintain magnetization even without an external magnetic field?

• Non-magnetic materials

• Paramagnetic materials

• Diamagnetic materials

• Ferromagnetic materials