Q 12-05-004NEETNEET 2023Top questionEasy
The net magnetic flux through any closed surface is :
Answer: (A) Zero
Concept. Gauss's law for magnetism: $\displaystyle\oint\vec{B}\cdot d\vec{S} = 0$.
Step 1. Reason. Magnetic monopoles do not exist and field lines form closed loops, so every line that enters a closed surface also leaves it. The inward and outward flux cancel exactly.
Answer. Zero (Option A).
Solution by Sreeraj P, M.Sc Physics