Verified Solution • 2025–26 Session moderate

QPages 121-124: Q61: HC Verma: Concepts of Physics - Volume 2 Electric Field Potential Pages 121-124: Q61 Solution: Two charged particles, with equal charges of , are brought from …

⚠️ Common Exam Traps & Conceptual Pitfalls

Students often multiply the $kq^2/r$ result by 2, thinking each charge contributes separately; remember the formula $U= k,q_1q_2/r$ already accounts for the single interaction between the two charges, so no extra factor of 2 is needed.

Two charged particles, with equal charges of 2.0×10−5 C2.0 \times 10^{-5} \text{ C}, are brought from infinity to within a separation of 10 cm. Find the increase in the electric potential energy during the process.

Step-by-Step Verified Solution

**Answer:** Increase in potential energy = 36 J. **STEP-BY-STEP Explanation:** q=2.0×10−5q = 2.0 \times 10^{-5} C each, final separation r=0.1r = 0.1 m.
U=kq2r=9×109×(2×10−5)20.1=36 JU = \frac{k q^2}{r} = \frac{9 \times 10^9 \times (2 \times 10^{-5})^2}{0.1} = 36 \text{ J}

All Questions in this Chapter

QPage 119: Q1 QPage 119: Q2 QPage 119: Q3 QPage 119: Q4 QPage 119: Q5 QPage 119: Q6 QPage 119: Q7 QPage 119: Q8 QPage 119: Q9 QPage 119: Q10 QPage 119: Q11 QPage 119: Q12 QPage 119: Q13 QPage 119: Q14 QPage 120: Q1 QPage 120: Q2 QPage 120: Q3 QPage 120: Q4 QPage 120: Q5 QPage 120: Q6 QPage 120: Q7 QPage 120: Q8 QPages 119-120: Q1 QPages 119-120: Q2 QPages 119-120: Q3 QPages 119-120: Q4 QPages 119-120: Q5 QPages 119-120: Q6 QPages 119-120: Q7 QPages 119-120: Q8 QPages 119-120: Q9 QPages 121-124: Q1 QPages 121-124: Q2 QPages 121-124: Q3 QPages 121-124: Q4 QPages 121-124: Q5 QPages 121-124: Q6 QPages 121-124: Q7 QPages 121-124: Q8 QPages 121-124: Q9 QPages 121-124: Q10 QPages 121-124: Q11 QPages 121-124: Q12 QPages 121-124: Q13 QPages 121-124: Q14 QPages 121-124: Q15.1 QPages 121-124: Q15.2 QPages 121-124: Q16 QPages 121-124: Q17 QPages 121-124: Q18 QPages 121-124: Q19 QPages 121-124: Q20 QPages 121-124: Q21 QPages 121-124: Q22 QPages 121-124: Q23 QPages 121-124: Q24 QPages 121-124: Q25 QPages 121-124: Q26 QPages 121-124: Q27 QPages 121-124: Q28 QPages 121-124: Q29 QPages 121-124: Q30 QPages 121-124: Q31 QPages 121-124: Q32.1 QPages 121-124: Q32.2 QPages 121-124: Q32.3 QPages 121-124: Q33 QPages 121-124: Q34 QPages 121-124: Q35 QPages 121-124: Q36 QPages 121-124: Q37 QPages 121-124: Q38 QPages 121-124: Q39 QPages 121-124: Q40 QPages 121-124: Q41 QPages 121-124: Q42 QPages 121-124: Q43 QPages 121-124: Q44 QPages 121-124: Q45 QPages 121-124: Q46 QPages 121-124: Q47 QPages 121-124: Q48.1 QPages 121-124: Q48.2 QPages 121-124: Q48.3 QPages 121-124: Q48.4 QPages 121-124: Q49 QPages 121-124: Q50 QPages 121-124: Q51 QPages 121-124: Q52 QPages 121-124: Q53 QPages 121-124: Q54 QPages 121-124: Q55 QPages 121-124: Q56 QPages 121-124: Q57 QPages 121-124: Q58 QPages 121-124: Q59 QPages 121-124: Q60 QPages 121-124: Q61 QPages 121-124: Q62 QPages 121-124: Q63 QPages 121-124: Q64 QPages 121-124: Q65 QPages 121-124: Q66 QPages 121-124: Q67 QPages 121-124: Q68 QPages 121-124: Q69 QPages 121-124: Q70 QPages 121-124: Q71.1 QPages 121-124: Q71.2 QPages 121-124: Q71.3 QPages 121-124: Q72 QPages 121-124: Q73 QPages 121-124: Q74 QPages 121-124: Q75

Related Learning Resources & Exam Preparation

Chapter Practice Bank
Practice all topic-wise questions from Electric Field Potential
Reference Textbook Solutions
Explore complete chapter exercises for HC Verma: Concepts of Physics - Volume 2
Competitive PYQ Question Bank
Browse year-wise authentic previous years' questions with solutions
Authentic CBT Mock Tests
Simulate official exam environment with live timer and percentile scoring