Verified Solution • 2025–26 Session moderate

QPages 329-330: Q2: HC Verma: Concepts of Physics - Volume 2 Alternating Current Pages 329-330: Q2 Solution: The reactance of a circuit is zero. It is possible that the…

⚠️ Common Exam Traps & Conceptual Pitfalls

Reactance is the algebraic sum of the individual reactances: $X_{ ext{total}}=X_L+X_C$. A lone inductor ($X_L=jomega L$) or capacitor ($X_C=-j/(omega C)$) cannot yield $X_{ ext{total}}=0$ unless the other component is present to cancel it. Zero reactance also occurs when no reactive elements are present. Always check whether the components’ reactances actually cancel or whether the circuit is purely resistive.

The reactance of a circuit is zero. It is possible that the circuit contains

Multiple Choice Options

  • A an inductor and a capacitor
  • B an inductor but no capacitor
  • C a capacitor but no inductor
  • D neither an inductor nor a capacitor

Step-by-Step Verified Solution

**Answer:** (a), (d). **Step-by-Step Explanation:** Reactance is zero at resonance (L and C present) or if neither is present (pure resistor).

All Questions in this Chapter

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