Question

Why are soft ferromagnetic materials used in transformer cores?

विकल्प

• 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.

Answer 1

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.