ISRO Electronics & Communication (ECE) 2006 - Question 1

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Topic: Network Theory

The value of C which gives the critical damping in the given circuit is (R = 1 ohm, L = 2H)

  • A. 2F
  • B. 4F
  • C. 8F
  • D. 1F

Answer: C. 8F

Explanation: In a series RLC circuit, for critical damping, the damping factor is equal to the resonant frequency. R/(2L) = 1/$\sqrt{LC}$. Solving for C gives C = 4L/(R²). Substituting R = 1 and L = 2 gives C = 8F.

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