Verified Solution • 2025–26 Session moderate

QPage 163: Q5: HC Verma: Concepts of Physics - Volume 2 Capacitors Page 163: Q5 Solution: A capacitor has capacitance . Is this information sufficient to …

⚠️ Common Exam Traps & Conceptual Pitfalls

Students often misuse $Q=CV$ by treating $V$ as a universal constant and conclude that $C$ alone fixes the maximum charge. In reality the capacitor’s voltage rating (breakdown voltage) must be known, because $Q_{max}=C\times V_{breakdown}$; without $V_{max}$ the charge limit cannot be determined.

A capacitor has capacitance CC. Is this information sufficient to know what maximum charge the capacitor can contain? If yes, what is this charge? If no, what other information is needed?

Step-by-Step Verified Solution

**Answer:** No, capacitance CC alone is not sufficient. The maximum charge also depends on the breakdown voltage (dielectric strength) of the capacitor. **Step-by-Step Explanation:** The maximum charge a capacitor can hold is Qmax=C×VmaxQ_{max} = C \times V_{max}, where VmaxV_{max} is the maximum voltage the capacitor can withstand without dielectric breakdown. The capacitance CC alone does not specify this limit .

All Questions in this Chapter

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