Give the properties of dia/para/ferromagnetic materials.

Answer in Brief

Properties	Dia	Para	Ferro
Magnetic susceptibility	Negative	Positive and small	Positive and large
Relative permeability	Slightly less than unity	Greater than unity	Large
Nature of magnetic field lines	Repelled or expelled from diamagnetic materials	Attracted into the paramagnetic materials	Strongly attracted to the ferromagnetic materials
Susceptibility	Temperature independent.	Inversely proportional to temperature.	Inversely proportional to temperature.
Examples	Bismuth, copper, and water, etc.	Aluminum, platinum, chromium, etc.	Iron, Nickel, and Cobalt

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Chapter 3 Magnetism and magnetic effects of electric current
Evaluation | Q II. 18. | Page 191

What type of magnetism is shown by a substance if magnetic moments of domains are arranged in same direction?

Explain the following with suitable examples:

Ferrimagnetism

Substances that are strongly attracted by the applied magnetic field and can be permanently magnetized are ____________.

When heated to high temperature, ferromagnetic substance changes to ____________.

Fe₃O₄is ____________.

A ferromagnetic substance becomes a permanent magnet when it is placed in a magnetic field becuase ______.

The value of magnetic moment is zero in the case of antiferromagnetic substances because the domains:

(i) get oriented in the direction of the applied magnetic field.

(ii) get oriented opposite to the direction of the applied magnetic field.

(iii) are oppositely oriented with respect to each other without the application of magnetic field.

(iv) cancel out each other’s magnetic moment.

Which one of the following would feel attraction when placed in magnetic field: Co²⁺, Ag⁺, Ti⁴⁺, Zn²⁺

Which one of the following homo-diatomic molecule is paramagnetic?

Which of the following statements are correct?

Electric monopoles do not exist whereas magnetic monopoles exist.
Magnetic field lines due to a solenoid at its ends and outside cannot be completely straight and confined.
Magnetic field lines are completely confined within a toroid.
Magnetic field lines inside a bar magnet are not parallel.
χ = -1 is the condition for a perfect diamagnetic material, where x is its magnetic susceptibility.