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

$\begin{array}{1 1} \text{all the domains get oriented in the direction of magnetic field } \\ \text{all the domains get oriented in the direction opposite to the direction of magnetic field } \\ \text{all the domains get oriented randomly} \\ \text{all the domains are not affected by magnetic field }\end{array} $

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