## Electric Field Due To Two Infinite Parallel Charged Sheets

Let us today again discuss another application of gauss law of electrostatics that is to calculate Electric Field Due To Two Infinite Parallel Charged Sheets:-

Consider two parallel sheets of charge A and B with surface density  of σ and –σ respectively .The magnitude of intensity of electric field on either side, near a plane sheet of charge having surface charge density σ is given by

E=σ/2ε0 Continue reading “Electric Field Due To Two Infinite Parallel Charged Sheets”

## Electric Field Due To An Infinite Plane Sheet Of Charge

Let us today discuss another application of gauss law of electrostatics that is Electric Field Due To An Infinite Plane Sheet Of Charge:-

Consider a portion of a thin, non-conducting, infinite plane sheet of charge with constant surface charge density σ. Suppose we want to find the intensity of electric field E at a point p1near the sheet, distant r in front of the sheet. Continue reading “Electric Field Due To An Infinite Plane Sheet Of Charge”

## Electric Field Due to An Infinite Line Of Charge derivation

We have already derived and discussed the gauss law of electrostatics. Let  us discuss its applications one by one. Toady I will derive and discuss the electric field due to an Infinite line Of Charge.

Electric Field Due to An Infinite Line Of Charge Or Uniformity Charged Long Wire or Thin Wire:- Continue reading “Electric Field Due to An Infinite Line Of Charge derivation”

## Coulomb Law From Gauss Law derivation

Gauss’s law for electrostatics is used for determination of electric fields in some problems in which the objects possess spherical symmetry, cylindrical symmetry,planar symmetry or combination of these. Let us discuss the applications of gauss law of electrostatics:

1. Electric Field Due To A Point Charge Or Coulomb’s Law From Gauss Law:-

To derive Coulomb’s Law from gauss law or to find the intensity of electric field due to a point charge +q at any point in space using Gauss’s law ,draw a Gaussian sphere of radius r at the centre of which charge +q is located (Try to make the figure yourself). Continue reading “Coulomb Law From Gauss Law derivation”

## Gauss law in differential form derivation

Last time I have derived and discussed the gauss law for electrostatics. Let us today derive and discuss the gauss law for electrostatics in differential form.

STATEMENT:-Differential form of Gauss law states that the divergence of electric field E at any point in space is equal to 1/ε0 times the volume charge density,ρ, at that point. Continue reading “Gauss law in differential form derivation”

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## Gauss law for electrostatics derivation

Do you know that if we know the charge distribution, then we can calculate the electric field due to this charge distribution? This is based on the gauss law of electrostatics.

Statement. Total electric flux through any closed surface, is equal to 1/ε times the total charge enclosed by the surface. Continue reading “Gauss law for electrostatics derivation”

## Why cannot petrol fire be extinguished by water?

Q:- Why cannot petrol fire be extinguished by water?

Ans:- As water is heavier than petrol therefore slips down permitting the petrol to rise to the surface and continue to burn. Besides, the existing temperature is so high that the water poured on the fire evaporates even before it can extinguisher the fire. The latter is true if small quantity water is poured. Thus the petrol fire can not be extinguished by water. Continue reading “Why cannot petrol fire be extinguished by water?”

## DEll written and interview questions

Following dell written and interview questions are provided by Mr. Aayush.
He is recently placed in this reputed company. All the best to him.
Dell written questions:
1. Three bells rings at the intervals of 36 seconds, 40 seconds and 48 seconds respectively. They start ringing together at a particular time. When they will start ringing together again?
(1)After 6 minutes
(2) After 12 minutes
(3)After 18 minutes
(4) After 24 minutes Continue reading “DEll written and interview questions”