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(D) Soft ferromagnetic materials are materials that can be easily magnetized and demagnetized by an external magnetic field.When an external magnetic

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may increase or decrease in size and change its orientation.

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(D) Soft ferromagnetic materials are materials that can be easily magnetized and demagnetized by an external magnetic field.When an external magnetic field is applied,the magnetic domains that are aligned with the field grow in size at the expense of those that are not aligned.Additionally,the domains experience a net torque,which causes them to change their orientation to align more closely with the external field.Therefore,the domains may increase or decrease in size and change their orientation.

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

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