Given below are two statements:
Assertion (A): Gauss's law for magnetism states that the net magnetic flux thr

Question

Given below are two statements:
Assertion (A): Gauss's law for magnetism states that the net magnetic flux through any closed surface is zero.
Reason (R): The magnetic monopoles do not exist. North and South poles occur in pairs, allowing vanishing net magnetic flux through the surface.

Accepted Answer

1. **Assertion Analysis:** Gauss's law for magnetism is mathematically expressed as $\oint \mathbf{B} \cdot d\mathbf{A} = 0$. This implies that the net magnetic flux passing through any closed surface is always zero. Hence, the assertion is **True**.
2. **Reason Analysis:** The fundamental physical justification for Gauss's law in magnetism is the non-existence of isolated magnetic poles (monopoles). Magnetic field lines always form continuous closed loops; they do not start or end at a point (unlike electric field lines which start/end on charges). Thus, the number of field lines entering a closed surface must equal the number of lines leaving it. Hence, the reason is **True**.
3. **Link:** The fact that magnetic monopoles do not exist is the direct reason why the net flux is zero. Therefore, (R) is the correct explanation of (A).

Step-by-Step Solution

Practice All PHYSICS Questions