Electric Charge

Question 1

Front

Answer 1

Back

Question 2

State Coulomb’s Law.

Answer 2

The electrostatic force F between two point charges is directly proportional to the product of their charges and inversely proportional to the square of the distance between them.

Question 3

Formula for force between charges in a vacuum.

Answer 3

F = (1 / (4πε₀)) * (Q₁Q₂ / r²)

Question 4

SI Unit of Electric Charge

Answer 4

Coulomb (C)

Question 5

Define electric field intensity.

Answer 5

Electric field intensity at a point is the force experienced by a unit positive charge placed at that point.

Question 6

Unit of Electric Field

Answer 6

Newton per Coulomb (N/C)

Question 7

Direction of electric field lines.

Answer 7

From positive to negative charge.

Question 8

What is electric potential at a point?

Answer 8

Work done to move a unit positive charge from infinity to that point in the field.

Question 9

SI unit of electric potential

Answer 9

Volt (V)

Question 10

Expression for potential due to point charge

Answer 10

V = (1 / (4πε₀)) * (Q / r)