If soft iron (ferromagnetic substance) is placed in external uniform magnetic field.

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Size of domain will change and orientation also change.

Size of domain will increase

Size of domain will decrease

Does not depend on external magnetic field.

answer is A.

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Detailed Solution

For ferromagnetic material when external magnetic field is applied the domain which are in favor of external magnetic field they expand at the same time they change their orientation.

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Result Producing online coaching for JEE/NEET of south India

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Best Online Course for NEET

Best Online Course for CBSE