**Contents**show

## How does the electric field at a point vary with the distance from a point electric charge?

The electric field varies **inversely as the square of the distance** from the point charge.

## How the electric field E depends upon the distance r due to an infinitely long thin straight charged wire?

Electric field due to an infinitely long straight uniformly charged wire : … By symmetry, the **magnitude of the electric field will be the same at all points on the curved surface of the cylinder** and directed radially outward. E and ds are along the same direction.

## How does the electric field vary with distance?

The strength of an electric field as created by source charge Q is **inversely related to square of the distance from the source**. This is known as an inverse square law. … If the separation distance increases by a factor of 4, the electric field strength decreases by a factor of 16 (4^2).

## What is the direction of electric field due to uniformly charged infinite wire?

The direction of electric field is **radially outward** if linear charge density is positive. On the other hand, it will be radially inward of the linear charge density is negative.

## What are the applications of Gauss theorem?

Gauss’s Law can be used **to solve complex electrostatic problems involving unique symmetries like cylindrical, spherical or planar symmetry**. … Gauss’s Law can be used to simplify evaluation of electric field in a simple way.

## What is the expression for electric field due to a uniformly charged infinite plane sheet?

**E=σ2ϵ0**. This is independent of the distance of P from the infinite charged sheet. The electric field lines are uniform parallel lines extending to infinity.

## How does electric field change for a thick sheet of charge?

For an infinite sheet of charge, **the electric field will be perpendicular to the surface**. Therefore only the ends of a cylindrical Gaussian surface will contribute to the electric flux . In this case a cylindrical Gaussian surface perpendicular to the charge sheet is used. Hope this will help you!

## What does electric field depend on?

The magnitude of the electric field around an electric charge, considered as source of the electric field, depends on **how the charge is distributed in space**. … The value of the electric field has dimensions of force per unit charge.

## What are the magnitude and direction of the electric field?

The electric field direction points straight away from a positive point charge, and straight at a negative point charge. The magnitude of the electric field falls off as **1 / r 2 1/r^2 1/r21, slash, r**, squared going away from the point charge.