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 magnetic field
b. All the domains get oriented in the direction opposite to the direction of magnetic field
c. Domains get oriented randomly
d. Domains are not affected by magnetic field.
Ans. a
Explanation : When a frrromagnetic substances can be magnetised by magnetic field to it and magnetic property persist within it even after removal of magnetic field.
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