5.3 MAGNETISM AND GAUSS’S LAW
Chapter 5: Chapter 5 · PHYSICS PART-1 · EN medium
From your actual textbook ✓
What does your textbook say about 5.3 MAGNETISM AND GAUSS’S LAW?
In Chapter , we studied Gauss’s law for electrostatics. In Fig . (c), we see that for a closed surface represented by i , the number of lines leaving the surface is equal to the number of lines entering it. This is consistent with the fact that no net charge is enclosed by the surface. However, in the same figure, for the closed surface ii , there is a net outward flux, since it does include a net (positive) charge. EXAMPLE . The situation is radically different for magnetic fields which are continuous and form closed loops. Examine the Gaussian surfaces represented by i or ii in Fig . (a) or Fig. . (b).
📖 NCERT Class 12 Physics Part 1 · Page 185
Read from the source
Complete lesson
In Chapter , we studied Gauss’s law for electrostatics. In Fig . (c), we see that for a closed surface represented by i , the number of lines leaving the surface is equal to the number of lines entering it. This is consistent with the fact that no net charge is enclosed by the surface.
However, in the same figure, for the closed surface ii , there is a net outward flux, since it does include a net (positive) charge. EXAMPLE . The situation is radically different for magnetic fields which are continuous and form closed loops. Examine the Gaussian surfaces represented by i or ii in Fig .
(a) or Fig. . (b). Both cases visually demonstrate that the number of magnetic field lines leaving the surface is balanced by the number of lines entering it.
The net magnetic flux is zero for both the surfaces. This is true for any closed surface.
Related topics
Want this shaped for your exam marks?
Get an AI answer grounded in your actual textbook — with the exact page reference.
Ask AI about this topic →