Coulombs Law

Question 1

What is Columbus law?

Answer 1

Any two point charges exert a force on each other which is proportional to the product of their charges and inversely proportional to the square of the distance between them.

Question 2

The equation for Coulomb’s law.

Answer 2

F = kQ₁Q₂ / r² (Where k = 1/4πε₀)

Question 3

If one charge was positive and the other was negative , Then?

Answer 3

The force F is negative.

Question 4

If the particles are twice as far , then?

Answer 4

The force is quarter of the previous one.

Question 5

The formula for electric field strength.

Answer 5

E = Q/ 4πε₀r²

Question 6

What happens to the potential energy of a positive charge as it is moved closer to a like charge.

Answer 6

It’s potential energy increases.

Question 7

The formula for the work done on a charge.

Answer 7

W = QV

Question 8

What is electric potential?

Answer 8

The E.P at a point is equal to the work done in bringing unit positive charge from infinity to that point.

Question 9

Equation for electric potential.

Answer 9

V = Q/ 4πε₀r

Question 10

The relationship between field strength and potential

Answer 10

Field strength = potential well or -potential gradient.

Question 11

For parallel electric field lines , the field strength is….

Answer 11

Constant.