COULOMB'S LAW : IMPORTANT QUESTIONS

 Q1  Given two point charges q₁ and q₂ such that q₁q₂ < 0. What is the nature of force between them? 

 Ans. it is possible if  one charge  is  positive and other charge is  negative  in nature. Hence, the force between the two charges will be attractive.

 Q2 Given two point charges q₁ and q₂ such that q₁q₂ > 0.what is the nature of force between the two charges? 

 Ans. As  q₁q₂ > 0  it implies that both the charges are positive in nature. Hence, the force between the two charges will be repulsive.

Q.What is the basic cause of quantisation of charge?

 Ans. During the charging process, only integral number of electrons is transferred from one body to the other. Therefore, charge possessed by a body is always an integral multiple of 1.6 x 10⁻¹⁹ C.

Q. How many electrons are present in one coulomb of charge?
Ans: as we know q =ne

n =q/e

n= 1/1.6 x 10⁻¹⁹ C. =  6.25 x 10¹⁸