Question

Choose the correct alternative from the following:

• A. Gauss law is true for any open surface.
• B. Gauss law includes the sum of all charges enclosed by the surface for calculation of electric flux through the surface.
• C. Gauss law can be used to calculate the magnetic field due to steady current.
• D. Gauss law is not based on the inverse square dependence on distance contained in the Coulomb's law.

Hint:

Always remember: Gauss’s law applies only to closed surfaces and is rooted in the inverse square law of Coulomb’s interaction.

Answer 1

The Correct Option is B

Option (1) is incorrect because Gauss’s law is valid only for closed surfaces.
Option (2) is correct — Gauss’s law states that the electric flux through a closed surface is proportional to the total electric charge enclosed within the surface.
Option (3) is incorrect — Gauss’s law is used in electrostatics, not for calculating magnetic fields.
Option (4) is incorrect — Gauss’s law is indeed derived based on the inverse square nature of Coulomb’s law.