Question
Download Solution PDFWhich of the following explains non-existence of magnetic monopoles?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is option 2) i.e. Gauss law of magnetism
CONCEPT:
- Gauss Law: Gauss law for magnetism states that the net magnetic flux through any closed surface is zero.
- The number of magnetic field lines entering a surface equals the number of magnetic field lines going out of a closed surface.
It is represented by:
∯ B.dA = 0
Where B is the magnetic field, A is the area vector of the surface.
EXPLANATION:
- From Gauss law for magnetism, for a given surface the magnetic field lines entering the surface will be equal to the magnetic field lines leaving the surface.
- This is inferred from the fact that the magnetic field towards the south pole is the same as the magnetic field that comes out from a north pole of a magnet. This is possible only when two poles are present.
- So, any magnetic field line entering will exit through the surface and any magnetic field exiting will enter through the surface. That means, there is no magnetic monopole where a magnetic field can start and end.
Therefore, Gauss's law for magnetism concludes that magnetic monopoles do not exist.
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