AP EAMCET202422 May 2024Evening ShiftPhysicsElectrostaticsActual
Two charges 5 nC and -2 nC are placed at points (5 ~cm , 0,0) and (23 ~cm , 0,0) in a region of space where there is no other external field. The electrostatic potential energy of this charge system is
Options
- A10 10⁻⁷ ~J
- B5 10⁻⁷ ~J
- C15 10⁻⁷ ~J
- D25 10⁻⁷ ~J
Correct answer
B. 5 10⁻⁷ ~J
Step-by-step solution
aligned & q ₁=5 nC =5 10⁻⁹ C , q ₂=-2 nC =-2 10⁻⁹ C & r =(23-5)=18 ~cm =18 10⁻² ~m aligned The electrostatic potential energy of charge system is aligned U & = kq ₁ q ₂ r = 9 10^9 5 10⁻⁹ 2 10⁻⁹ 18 10⁻² & =5 10⁻⁷ ~J aligned