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Question 20215
JEE Physics · Medium

Electromagnetic Induction and Alternating Current: Impedance Calculation MCQ

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Impedance CalculationMediumQuestion 20215

Question

A series LCR circuit has R = 30 Ω, X_L = 70 Ω, X_C = 30 Ω. Impedance is:
  1. A
    50 Ω
    Correct
  2. B
    70 Ω
  3. C
    100 Ω
  4. D
    130 Ω

Correct answer

50 Ω

Explanation

Z = √[R² + (X_L − X_C)²] = √[30² + (70−30)²] = √[900 + 1600] = √2500 = 50 Ω.

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