Physics
Physics
Problem
Answer the following questions with reference to electric potential difference. a. (i) Define electric potential difference between two points in an electric circuit. b. (ii) State the SI unit of potential difference and express it in terms of the units of work and charge. c. (iii) Define one volt in words.Intuitive explanation
Electric potential difference measures the work done per unit charge to move a charge between two points in an electric field. The key insight is that potential difference is path-independent—it depends only on the starting and ending positions, not how you get there. This means you can use energy conservation and the relationship to connect electric fields, forces, and energy changes, making it a powerful tool for solving circuits and field problems without tracking every detail of the motion.
Intuitive explanation
Electric potential difference measures the work done per unit charge to move a charge between two points in an electric field. The key insight is that potential difference is path-independent—it depends only on the starting and ending positions, not how you get there. This means you can use energy conservation and the relationship to connect electric fields, forces, and energy changes, making it a powerful tool for solving circuits and field problems without tracking every detail of the motion.