The net magnetic flux through any closed surface is :

1. Negative

2. Zero

3. Positive

4. Infinity

Doubtly Asked 30 Oct 2026 NEET UG 2023 Practice test neet Save WhatsApp Report

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Answer: 2. Zero

Magnetic monopoles do not exist, so field lines always form closed loops: every line entering a closed surface also leaves it.

Hence by Gauss's law for magnetism, \(\oint \vec B\cdot d\vec S = 0\). The net flux through any closed surface is zero.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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