State Coulomb’s Inverse-square law is electrostatics..
The electrostatic force of attraction or repulsion between two stationary point charges is directly proportional to the product of the magnitudes o...
What are the limitations of Coulomb’s law?
Coulomb’s law holds good for stationary point charges. Coulomb’s law is not universal as it depends on the properties of the intervening medium.
Is electrostatic force between two point charges a central force.
Yes. The electrostatic force between two point charges always acts along the line joining the two charges. Hence it is a central force.
What is one coulomb of charge?
One coulomb of charge is that charge which when placed at rest in vacuum at a distance of one metre from an equal and similar stationary charge rep...
Q.1. State coulomb’s law.
Ans: According to Coulomb’s law, the magnitude of the electrostatic force of attraction or repulsion between two point charges is directly proporti...
Q.2. The electrostatic force is maximum in air. Why?
Ans: The value of permittivity is least for air/vacuum. That is why Coulomb’s force is maximum in air.
Q.3. Why is Coulomb’s law called inverse square law?
Ans: According to Coulomb’s law, the electric force between two charges varies inversely with the square of the distance between the two charges. T...
Q.4. Write the limitations of Coulomb’s law.
Ans: The formula can be applied with charges of regular and smooth shape, but it becomes complex when we are working with charges having irregular...
Q.5. What is the S.I. unit of relative permittivity?
Ans: Relative permittivity is a ratio of force acting between two charges in air and medium. It is a unitless quantity.
What is 1 Coulomb of Charge?
A coulomb is that charge which repels an equal charge of the same sign with a force of 9×10 9 N, when the charges are one meter apart in a vacuum. Coulomb force is the conservative mutual and internal force.
What happens when Q is displaced perpendicular to AB?
If q is displaced perpendicular to AB, the force F A and F B bring the charge to its original position. So for perpendicular displacement, the equilibrium is stable.
What is Coulomb's law?
According to Coulomb’s law, the force of attraction or repulsion between two charged bodies is directly proportional to the product of their charges and inversely proportional to the square of the distance between them. It acts along the line joining the two charges considered to be point charges.
What is the magnitude of Q in equilibrium?
It can also be shown that for the equilibrium of B, the magnitude of q must be 1/4 of the magnitude of either charge.
What is the force between two electrons separated by a certain distance?
8. Between two-electrons separated by a certain distance: Electrical force/Gravitational force = 10 42
What is force on a charged particle due to a number of point charges?
Force on a charged particle due to a number of point charges is the resultant of forces due to individual point charges i.e.
Why is Coulomb's law so difficult to implement?
It is difficult to implement Coulomb’s law where charges are in arbitrary shape because in such cases we cannot determine the distance’ between the charges.
Why do charges of the same sign push each other?
From Coulomb’s Law, we can conclude that charges of the same sign will push each other way due to the forces of repulsion acting between them. In contrast, charges with opposite polarities will pull each other closer due to the force of attraction acting between them. This can be stated as like charges repel each other and unlike charges attract each other.
What is the point charge law?
This law gave a perfect estimate of the force acting between two point charges. In physics, the word “Point charge” is used to define extremely small bodies. This means that the linear size of the charged bodies is very small, especially in comparison to the distance between the two bodies. Thus, by considering these charged bodies as point charges, it becomes easier for us to calculate the magnitude of electrostatic forces acting between them.
How is Coulomb's law valid?
The validity of Coulomb’s Law is determined by the number of molecules of solvent between the two charged bodies. If the average number of solvent molecules between the two interacting charged particles is large enough, we can only apply this law.
What direction does Coulomb's force go?
The direction of Coulomb’s force is along the length of the line joining the centres of the two charges. It can be inwards or outwards, depending on the force of attraction or repulsion between the charges.
What happens if the shape of the charged body is arbitrary?
If the shape of the charged body is arbitrary, then we will not be able to determine the distance between the charges, and it becomes difficult to apply this law.
Do two charges repel each other?
Here the polarities of both charges are the same. Thus, the two charges will repel each other. This means that is the repulsive force exerted by the charge on and is the repulsive force exerted by the charge on
Which law holds for two or more point charges at rest?
Coulomb’s law of electrostatics holds for two or more point charges at rest.
