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

Options

A. Decrease in size and changes orientation
B. Increase in size but no change in orientation
C. Have no relation with external magnetic field
D. May increase or decrease in size and change its orientation

Answer

D

Explanation

Atoms of ferromagnetic material in unmagnetised state form domains inside the ferromagnetic material . These domains have large magnetic moment of atoms . In the absence of magnetic field , these domains have magnetic field is applied , domains aligned in the direction of the field frow in size and those aligned in the direction opposite to the field reduce in size and also its orientation changes .