GENERAL KNOWLEDGE

Detailed explanation-1: -Explanation: The electrostatic force is directly related to the product of the charges and inversely related to the square of the separation distance. Tripling one of the charges would serve to triple the force.

Detailed explanation-2: -Explanation: The force between the two charges is directly proportional to the product of the charges and inversely to the square of the distance between them. Hence, if charge on q1 is tripled (and other charge and distance is kept constant, the force between the two charges is tripled.

Detailed explanation-3: -The size of the force varies inversely as the square of the distance between the two charges. Therefore, if the distance between the two charges is doubled, the attraction or repulsion becomes weaker, decreasing to one-fourth of the original value.

Detailed explanation-4: -So as two objects are separated from each other, the force of gravitational attraction between them also decreases. If the separation distance between two objects is doubled (increased by a factor of 2), then the force of gravitational attraction is decreased by a factor of 4 (2 raised to the second power).

Detailed explanation-5: -Justification: The electric force one charge exerts on another is directly proportional to the product of the two charges, and thus is also proportional to each individual charge. If the magnitude of one charge is doubled then the magnitude of the force is also doubled.