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JEE Main 201325 AprilOnline
Exam
JEE Main
Year
2013
Date
25 April
Mode
Online
Subject
Physics
Chapter
Alternating Current

JEE Main 2013 · 25 April · Online · Physics · Alternating Current

When resonance is produced in a series LCR circuit, then which of...

When resonance is produced in a series LCR circuit, then which of the following is not correct?

Options

  1. ACurrent in the circuit is in phase with the applied voltage.
  2. BInductive and capacitive reactances are equal.
  3. CIf R\mathrm{R} is reduced, the voltage across capacitor will increase.
  4. DImpedance of the circuit is maximum.

Correct answer

D. Impedance of the circuit is maximum.

Step-by-step solution

Impedance (Z)(Z) of the series LCR circuit is Z=R2+(XL−XC)2Z=\sqrt{R^2+\left(X_L-X_C\right)^2}Atresonance,At resonance,\mathrm{X}_{\mathrm{L}}=\mathrm{X}_{\mathrm{C}}Therefore,Therefore,Z_{\text{minimum }}=R
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