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Question
Why are soft ferromagnetic materials used in transformer cores?
Options
They retain magnetisation for longer durations.
They magnetise strongly and improve the magnetic effect.
They keep magnetic dipoles in random orientation.
They eliminate the magnetic field inside the core.
MCQ
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Solution
Soft ferromagnetic materials magnetise strongly, which improves the magnetic effect in transformer cores. Retention of magnetisation for longer durations is the stated reason for choosing hard magnetic materials for permanent magnets.
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