## Stress

Stress The internal restoring force acting per unit area of cross–section of the deformed body is called stress. Stress = (Internal Restoring force/Area of cross section) = Finternal/A = Fexternal/A SI Unit : Nm–2 Dimensions...

## Form of Coulomb’s Law when Dielectric is filled partially between the charges

Form of Coulomb’s Law when Dielectric is filled partially between the charges Suppose two charge particles q1 and q2 are placed r distance apart in vacuum, then from Coulomb’s Law force acting between...

## Electrostatic Equilibrium of charged particles

Electrostatic Equilibrium of charged particles Electrostatics Equilibrium:- In equilibrium net electric force on every charged particle is zero. The equilibrium of a charged particle, under the action of Colombian forces alone...

## Principle of superposition

Principle of superposition   The force is a two body interaction, i.e., electrical force between two point charges is independent of presence or absence of other charges and so the principle of superposition is valid, i.e...

## Numerical on Coulomb’s Law

Numerical on Coulomb’s Law     Example 1. Find out the electrostatics force between two point charges placed in air (each of +1 C) if they are separated by 1m . Example 2. Two particles having charges q1 and q2...

## Coulomb’s Law (Inverse Square Law)

Coulomb’s Law (Inverse Square Law) On the basis of experiments Coulomb established the following law known as Coulomb’s law. The magnitude of electrostatic force between two point charges is (i) directly proportional to...

## Methods of Charging of a body

Methods of Charging of a body A body can be charged by means of:- (a) friction, (b) conduction, (c) induction, (d) thermionic ionization or thermionic emission (e) photoelectric effect and (f) field emission. (a) Charging by...