For diamagnetic materialsa)additional field caused by atoms is always parallel in direction to that of the external fieldb)additional field caused by atoms is always perpendicular in direction to that of the external fieldc)additional field caused by atoms is always in same direction as that of the external fieldd)additional field caused by atoms is always opposite in direction to that of the external fieldCorrect answer is option 'D'. Can you explain this answer?

Question

Answer

Diamagnetic materials are those that do not possess any permanent magnetic moment. When placed in an external magnetic field, these materials tend to weaken the field and create a magnetic field in the opposite direction. This behavior is due to the induced magnetic moments in the atoms of the material.

The additional field caused by the atoms of diamagnetic materials is always opposite in direction to that of the external field. This can be explained by considering the motion of electrons within the atoms.

Explanation:
1. Electron motion: The electrons in an atom are constantly in motion. When a diamagnetic material is placed in an external magnetic field, the electrons experience a force due to the interaction between their magnetic moments and the external field.

2. Induced magnetic moment: As a result of this force, the electrons start to circulate in orbits that are perpendicular to the external field. This circulation of electrons creates an induced magnetic moment in the opposite direction to the external field.

3. Magnetic field cancellation: The induced magnetic moments in the atoms of the diamagnetic material align in such a way that they cancel out the external magnetic field. This leads to a weakening of the overall magnetic field within the material.

4. Diamagnetic behavior: Due to the cancellation of the external field by the induced magnetic moments, diamagnetic materials exhibit weak repulsion when placed in a magnetic field. This repulsion is a result of the material trying to oppose the external field.

Conclusion:
The additional field caused by the atoms in diamagnetic materials is always opposite in direction to that of the external field. This behavior is a consequence of the induced magnetic moments in the atoms, which align in such a way as to weaken and oppose the external field.

Answer

It is because when we make a group of electrons inside the material it is called domain. So when we apply external magnetic field on the material. Those domains start to align themselves in the direction of magnetic field. BUT NOT ALL DOMAINS ALIGN THEMSELVES IN THAT DIRECTION. So option D is correct.

Answer

It is because when we make a group of electrons inside the material it is called domain. So when we apply an external magnetic field on the material. Those domains start to align themselves in the direction of the magnetic field. BUT NOT ALL DOMAINS ALIGN THEMSELVES IN THAT DIRECTION. So option D is correct.

Similar Class 12 Doubts

The electric field intensity E, due to an electric dipole of moment p, at a point on the equatorial line is

The electric field intensity E, due to an electric dipole of moment p, at a point on the equatorial line is

A metallic wire bent in the form of semi circle of radius 0.1 m is moved in a direction parallel to its plane, but perpendicular to a magnetic field B =20 mT with a velocity of 10 m/s . find the emf induced inthe wire?

A charge of +10Âµ coulomb enters a uniform magnetic field parallel to its direction. What will happen to the charge?

Which one of the following, when suspended freely, slowly sets itself parallel to the direction of the magnetic field?

Top Courses for Class 12

Suggested Free Tests

Related Content

Schools

Competitive Examinations

Quick Access Links

Technical Exams