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Magnetic and Non-Magnetic Substances

Explain why p...

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Explain why paramagnetic materials and ferromagnetic materials are attracted and strongly attracted by external magnetic field?

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Q. Assertion: On heating ferromagnetic or ferrimagnetic substances, they become paramagnetic.
Reason: Both ferromagnetic and ferromagnetic are strongly attracted by the magnetic field.

N_{1}

N_{2}

N_{3}

are made up of ferromagnetic, paramagnetic and diamagnetic material, respectively. A magnet, when brought close to them, will :

(I)

N_{1}

strongly, attract

N_{2}

weakly and repel

N_{3}

(I I)

N_{1}

more strongly than

N_{2}

(I I I)

N_{1}

N_{2}

strongly but repel

N_{3}

(I V)

. Attract all of them.

Q. The magnetic susceptibility is negative for
(a) paramagnetic materials only
(b) diamagnetic materials only
(c) ferromagnetic materials only
(d) paramagnetic and ferromagnetic materials

Q. Assertion :Iron, cobalt, nickel and

C r O_{2}

are called ferromagnetic substances. Reason: Ferromagnetic substances are weakly attracted by magnetic field.

Q. If the magnetic dipole moment of an atom of diamagnetic material, paramagnetic material and ferromagnetic material are denoted by

μ d, μ p and μ f

respectively, then:

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