Coulomb's Law

Question 1

When was the Coulomb’s law published?

Answer 1

1785, to calculate the magnitude of the force of attraction/repulsion between two electrically charged particles.

Question 2

What is the triboelectric effect?

Answer 2

The effect of two objects after being electrically charged by rubbing and then pulling them apart.

Question 3

What does the conservation of charge state?

Answer 3

Charge can neither be created nor destroyed, it can only be transformed from a system to another system.

Question 4

What is a unit of charge?

Answer 4

Electric charge = “C”
“C”= 6.24E18 e
“e” ( charge of a proton) = 1.60E-19 C

Question 5

What does the Coulomb’s law state?

Answer 5

The magnitude of the electric force is directly proportional to the product of the Ke constant and the charge of particle 1 and 2, and is indirectly proportional to the square of the distance between them.

Question 6

What is the Ke constant in the Coulomb’s law?

Answer 6

Ke = 9.0E9 N.m^2/C^2

Question 7

What is the Newton’s law of Gravity?

Answer 7

The magnitude of the gravitational force is directly proportional to the product of the gravitational constant and the mass of object 1 and 2, and also indirectly proportional to the square of the distance between them.
Gravitational constant = 6.67E-11N.m^2/Kg^2