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

(a) all the domains get oriented in the direction of a magnetic field

(b) all the domains get oriented in the direction opposite to the direction of a magnetic field

(c) domains get oriented randomly

(d) domains are not affected by a magnetic field

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Solution

Answer: (a) When a ferromagnetic substance is placed in a magnetic field it becomes a permanent magnet because all the domain gets oriented in the direction of magnetic field even after removal of the applied magnetic field.

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Similar questions

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

(a) get oriented in the direction of the applied magnetic fiels

(b) get oriented opposite to the direction of the applied magnetic fiels

(d) cancel out each other's magnetic moment

Which of the following statements are correct ?

(a) Ferrimagnetic substances lose ferrimagnetism on heating and become paramagnetic

(b) Ferrimagnetic substances do not lose ferrimagnetism on heating and remain ferrimagnetic

(c) Antiferromagnetic substances have domain structures similar to ferromagnetic substances and their magnetic moments are not cancelled by each other

(d) In ferromagnetic substances, all the domains get oriented in the direction of magnetic filed and remain as such even after removing magnetic field

Which of the following statements is not true?

(a) Paramagnetic substances are weakly attracted by magnetic field

(b) Ferromagnetic substances cannot be magnetised permanently

(d) Pairing of electrons cancels their magnetic moment in the diamagnetic substances

Q. In the unmagnetized state, magnetic domains of a magnetic substance are oriented at :

Q. A ferromagnetic material is placed in an external magnetic field. The magnetic domains in it,

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