Two charges Q1 and Q2 C are placed at points R and S. A third charge Q3 C is moved from point R to S along the circular path. Change in potential energy of the charge is:
Correct answer: C. 4KQ2Q3
- A. KQ1Q2Q3
- B. 4KQ1Q2
- C. 4KQ2Q3
- D. 2/3 KQ2Q3
Explanation
When a charge Q3 moves in the electric field created by another charge Q2, the change in potential energy depends on the charges involved and the electric constant K. The path taken does not affect the potential energy change, only the initial and final positions matter. The correct option, 4KQ2Q3, correctly represents the interaction between Q2 and Q3 as Q3 is moved, resulting in a change in potential energy. The other options either involve incorrect charges or incorrect factors, leading to incorrect results.
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Electrostatics describes forces between charges through Coulomb's law, electric fields and field intensity, then uses electric potential to measure energy per unit charge. Capacitors store charge and electrical energy, with capacitance depending on geometry and dielectric material, not simply on the amount of charge present.
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