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NEET2007PhysicsAlternating CurrentActual

In a circuit, L, C and R are connected in series with an alternating voltage source of frequency f . The current leads the voltage by 45^ . The value of C is

Options

  1. A1 2 f(2 f L+R)
  2. B1 f(2 f L+R)
  3. C1 2 f(2 f L-R)
  4. D1 f(2 f L-R)

Correct answer

C. 1 2 f(2 f L-R)

Step-by-step solution

( aligned & = X_C-X_L R & ( 4 )= 1 C - L R & R= 1 C - L & (R+2 f L)= 1 2 f C & or C= 1 2 f(R+2 f L) aligned )

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