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Questions  

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

detailed solution

Correct option is A

A ferromagnetic substance is a substance in which the magnetic moments of the individual atoms are aligned and point in the same direction. These substances are strongly magnetized when placed in an external magnetic field.

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