Verified Solution • 2025–26 Session moderate

QPages 197-198: Q7: HC Verma: Concepts of Physics - Volume 2 Electric Current in Conductors Pages 197-198: Q7 Solution: Identify the correct options.

⚠️ Common Exam Traps & Conceptual Pitfalls

Students frequently assume that the total work done by the battery equals the energy stored in the capacitor, ignoring that exactly half the energy is dissipated as heat in the resistor. Remember that $W_{battery} = 2U_{capacitor}$, so the energy stored is only half the total work done.

Identify the correct options.

Multiple Choice Options

  • A a) As a capacitor charges, current decreases exponentially with time,
  • B b) As a capacitor charges, potential difference across it increases exponentially with time,
  • C c) Energy stored in the capacitor during charging is equal to heat dissipated in the resistor,
  • D d) Total work done by the battery during charging is equal to the energy stored in the capacitor

Step-by-Step Verified Solution

**Answer:** (b) A voltmeter should have large resistance. **Step-by-Step Explanation:** A voltmeter should have large resistance to avoid drawing significant current.

All Questions in this Chapter

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