Question

The intergral form of Gauss law is given by
1. \(\frac{\partial }{dt}( B.dA) = 0\)
2. ∮ B.dA = 0
3. ∫ B.dA = 0
4. ∰ B.dA = 0

Answer 1

Correct Answer - Option 2 : ∮ B.dA = 0

The correct answer is option 2) i.e.  ∮B.dA = 0

CONCEPT:

• Gauss Law: Gauss law 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 of magnetism, ∮ B.dA = 0