The Gauss law for electric field is valid for:

CONCEPT:

Gauss law:

• According to this law, the total flux linked with a closed surface called Gaussian surface is 1/ϵ_o times the charge enclosed by the closed surface.

\(\Rightarrow \phi=\oint \vec{E}.\vec{dA}=\frac{Q}{\epsilon_o}\)

• This law is applicable to all the closed surfaces.

EXPLANATION:

• According to this law, the total flux linked with a closed surface called Gaussian surface is 1/ϵo times the charge enclosed by the closed surface.
• So, this law is applicable to all the closed surfaces. Hence, option 1 is correct.