Verified Solution • 2025–26 Session moderate

QPages 165-170: Q39: HC Verma: Concepts of Physics - Volume 2 Capacitors Pages 165-170: Q39 Solution: A capacitor with stored energy 4.0 J is connected with an…

⚠️ Common Exam Traps & Conceptual Pitfalls

Students often incorrectly assume total energy is conserved, predicting 4.0 J, but must recognize that connecting a charged capacitor to an uncharged one dissipates half the energy as heat due to transient currents, leaving only 2.0 J stored.

A capacitor with stored energy 4.0 J is connected with an identical capacitor with no electric field in between. Find the total energy stored in the two capacitors.

Step-by-Step Verified Solution

**Answer:** Total energy = 2.0 J. **Step-by-Step Explanation:** Initial energy = 4.0 J on one capacitor. When connected to an identical uncharged capacitor, the charge distributes equally. Final energy = Initial energy / 2 = 2.0 J (loss = 2.0 J as heat).

All Questions in this Chapter

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