# Neeraj Anand-Gauss Theorem-Guass Law in Electrostatics-Applications-Formula-Physics Class 12 Notes Study Material pdf slideshow ppt download-Anand Classes

Gauss Law – Applications, Gauss Theorem Formula

**Gauss law** states that the total electric flux out of a closed surface is equal to the charge enclosed divided by the permittivity. The electric flux in an area is defined as the electric field multiplied by the area of the surface projected in a plane and perpendicular to the field.

## Frequently Asked Questions on Gauss Law

### Can the Gauss law be applied to all surfaces?

For any closed surface and for any distribution of charges, the Gauss law is valid.

### Can the Gauss law be applied to the non-uniform electric field?

### State the Gauss law.

According to the Gauss law, the net flux of an electric field in a closed surface is directly proportional to the charge enclosed.

### What is the factor on which the electric field lines depend?

The Gauss law is interpreted in terms of the electric flux through the surface. The electric flux through the surface is the number of lines of force passing normally through the surface. The electric flux depends on the charge enclosed by the surface.

### When is the flux through the surface taken as positive or negative?

The flux through the surface is taken as positive if the flux lines are directed outwards and negative if the flux is directed inwards.

### What is called a Gaussian surface?

A Gaussian surface is a surface through which the electric flux is calculated.

### Can Coulomb’s law be derived using the Gauss law?

Yes, Coulomb’s law can be derived using the Gauss law and vice-versa.

### Define surface charge density.

When the charge is uniformly distributed over the surface of the conductor, it is called surface charge density.

For CBSE Class 12 Physics, students typically learn about Gauss’s Law in the context of electrostatics and its applications in determining electric fields due to symmetrically distributed charges. They may also learn about its applications in understanding the behavior of conductors and insulators in electrostatic equilibrium.