NDA General Ability Question (2025) — Solution

Step-by-step solution

The basic properties of electric charge are additivity, conservation, and quantization. Additivity means total charge is the algebraic sum of individual charges. Conservation of charge states that the total charge of an isolated system remains constant. Charges can neither be created nor destroyed in an isolated system, though equal amounts of positive and negative charges can be created or destroyed together (like in pair production or annihilation). Quantization means charge is always an integral multiple of the elementary charge (e). Therefore, the statement that charges can be created and destroyed in an isolated system is incorrect and is not a property of electric charge. Answer: Charges can be created and destroyed in an isolated system