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QPage 329: Q6: HC Verma: Concepts of Physics - Volume 2 Alternating Current Page 329: Q6 Solution: Which of the following plots may represent the reactance of a…

⚠️ Common Exam Traps & Conceptual Pitfalls

Students often assume inductive reactance ($X_L$) always dominates or that the net reactance must be positive, ignoring that $X_L - X_C$ can be negative when capacitive reactance exceeds inductive reactance. Remember that the net reactance of a series LC circuit is algebraic, allowing the plot to cross the frequency axis and extend into negative values.

Which of the following plots may represent the reactance of a series LC combination?

Multiple Choice Options

  • A Plot a
  • B Plot b
  • C Plot c
  • D Plot d

Step-by-Step Verified Solution

**Answer:** Plot c. **Step-by-Step Explanation:** The reactance of a series LC combination is X = _L - 1/(_C). This can be negative, zero, or positive. Plot c represents this.

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