When a dielectric is placed in an electric field, it gets polarised. The electric field in a polarised material is less than the applied field. When a paramagnetic substance is kept in a magnetic field, the field in the substance is more than the applied field. Explain the reason of this opposite behaviour.
Answers
Explanation:
Case-1: When a dielectric is located in an electric field, it becomes polarised.
Case-2: When a paramagnetic material is held in a magnetic field, the field in the material is higher than the applied field.
This different behavior is due to the opposite act of magnetic dipole as related to an electric dipole. When the paramagnetic material located in the magnetic field, the way of a magnetic field at the center of the magnetic dipole of substance is near the direction of the magnetic moment which is opposite to the case of the dipole in an electric field. And also, if the paramagnetic material is held in the magnetic field then its magnetic dipole adjusts in the direction of the field. Thus, the magnetic field due to the magnetic dipole continues up to the applied magnetic field. Hence, an extra magnetic field produced in the direction of the applied field.
