GENERAL KNOWLEDGE

Detailed explanation-1: -This equation is known as Coulomb’s law, and it describes the electrostatic force between charged objects. The constant of proportionality k is called Coulomb’s constant. In SI units, the constant k has the value k = 8.99 × 10 9 N ⋅ m 2 /C 2.

Detailed explanation-2: -The relative magnitudes of the Coulomb constant, k = 9 x 109 and the gravitational constant, G = 6.67 x 10-11, is an indication of the relative strengths of the two forces. The electrical force of attraction is much, much stronger than the gravitational force of attraction.

Detailed explanation-3: -Here is called the permittivity of free space which is defined as the distributed capacitance in vacuum. The measured value of is. 85 × 10-12 C 2 / N-m 2 . For simplified numerical calculations one can approximately use 1 4 0 = 9 × 10 9 N-m 2 / C 2 .

Detailed explanation-4: -A coulomb (C) is the standard unit of electric charge in the International System of Units (SI). It is the amount of electricity that a 1-ampere (A) current carries in one second (s). A quantity of 1 C is equal to the electrical charge of approximately 6.24 x 1018 electrons or protons.

Detailed explanation-5: -The value of is. 99 × 10 9 N . m 2 / C 2.