Recall Coulomb's Law, which states that the electrostatic force (F) between two charges is inversely proportional to the square of the distance (r) between them: F (1)/(r2).

Here are the solutions to the multiple-choice questions: 1. If distance between two charges is doubled, the Coulomb force becomes: Step 1: Recall Coulomb's Law, which states that the electrostatic force (F) between two charges is inversely proportional to the square of the distance (r) between them: F (1)/(r^2). Step 2: If the distance is doubled (r' = 2r), the new force (F') will be: F' (1)/((2r)^2) = (1)/(4r^2) = (1)/(4) F The force becomes one-fourth of the original force. The correct option is (B) One-fourth. 2. The dimensional formula of electric potential is: Step 1: Electric potential (V) is defined as work done (W) per unit charge (q): V = (W)/(q). Step 2: The dimensions of work (energy) are [ML^2T^-2]. Step 3: The dimensions of charge are [AT] (current × time). Step 4: Substitute these dimensions into the formula for electric potential: [V] = \