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A soft ferromagnetic material is placed in an external magnetic field. The magnetic domains

1. increase in size but no change in orientation.
2. have no relation with external magnetic field.
3. decrease in size and changes orientation.
4. may increase or decrease in size and change its orientation.

Correct answer: may increase or decrease in size and change its orientation.

Solution

When a soft ferromagnetic material is subjected to an external magnetic field, the magnetic domains can realign and adjust in size to enhance the material's magnetization, allowing for both increases and decreases in domain size and changes in orientation.

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