In the unmagnetized state, magnetic domains of a magnetic substance are oriented at :
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
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
(c) are oppositely oriented with respect to each other withot the application of magnetic field
(d) cancel out each other's magnetic moment
Which of the following statements is not true?
(a) Paramagnetic substances are weakly attracted by magnetic field
(b) Ferromagnetic substances cannot be magnetised permanently
(c) The domains in antiferromagnetic substances are oppositely oriented with respect to each other
(d) Pairing of electrons cancels their magnetic moment in the diamagnetic substances
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