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”

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”

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”

Why is it less difficult to cook rice or potatoes at higher altitudes?

Q:- Why is it less difficult to cook rice or potatoes at higher altitudes?

Ans:- Atmospheric pressure at higher altitudes is low and boils water below 1000 C because the boiling point of water is directly proportional to the pressure on its surface. As less boiling point is required at higher altitudes therefore it is less difficult to cook rice or potatoes at higher altitudes. Continue reading “Why is it less difficult to cook rice or potatoes at higher altitudes?”