NCERT In-text 11.2 — Q2 - Electricity
Question: What is meant by saying that the potential difference between two points is 1 V?
Answer: A potential difference of 1 V between two points means that 1 joule of work is done to move 1 coulomb of charge from one point to the other.
Full step-by-step NCERT solution with diagrams on Something by Zero.