Question

Q 8. (a) What is meant by electrostatic
force ? ​

Answer 1

$\huge\rm Electrostatic \: Force$

This is a type of force, which causes attraction or repulsion between two particles due to Electric Charges.

Like charges repel and unlike charges attract.

Example :- Rubbing a scale on oily hair, attracts pieces of paper, here both of them accumulate Unlike Charges, as paper has Negative charge while scale has Postive charge

Additional Information

• Electrostatic Force is a non contact Force, because it doesn't require contact with other body, they push or pull objects without getting touched

• Electrostatic Force is also called Coulomb Force or Coulomb interaction.

• It is named after a French Physicist Charles - Augustin de Coulomb.

• The electrostatic force acts in about, one-tenth of the diameter of atomic nucleus.

• Electrostatic Force is $\bf 10^{36}$ times, greater than Gravitational Force.

• Electrostatic follows Inverse Square laws that is it is inversely proportional to the square of the distance from the source.

Coulomb's Law Formula:-

$\huge \bf F = k \dfrac{q_{1} q_{2} }{r^{2} }$

Answer 2

Answer:

The force acting between two electric charges at rest is called electrostatic force.

According to the Coulomb's Law, the magnitude of the electrostatic force F between two point charges q1 and q2 seperated by distance r in vacuum is given by,

F = 1 / (4πEo) . (q1 × q2) / r²

where,

Eo is the permitivity of vacuum.

The force acting between two magnetic poles is called magnetic force.

In fact the, electrostatic and the magnetic force are interlinked.

'A piece of Supplementary Counsel' :-

For example :- a moving charge produces a magnetic field. Also, a magnetic field exerts a force on a moving charge. This force depends on both the magnitude and direction of the velocity of the electric charge. Thus, the electrostatic and magnetic forces are inseparable and are considered as the two facets of a general force known as electromagnetic force.

• Important properties of Electrostatic Force :

➡ Electrostatic Force may be attractive or repulsive. Like force repel each other and unlike charges attract each other.

➡ It obeys inverse square law.

➡ It is a long range force and does not require any intervening medium for its operations.

➡ It is a central force (i.e., it acts along the line joining the centres of the two bodies).

➡ It is a conservative force (i.e., work done in moving a body against the gravitational force is path independent)

➡ It is 10^36 times stronger than the gravitational force.

➡ It is caused by the exchange of photons (Y - Gamma) between two charged particles.