AC Circuit - R-L Circuit objective questions (mcq) and answers

26.  When a sinusoidal voltage is applied across R-L series circuit having R = X_L , the phase angle will be

   A. 90^o

   B. 45^o lag

   C. 45^o lead

   D. 90^o leading

27.  A unit step voltage is applied at t = 0 to a series R-L circuit with zero initial conditions

   A. It is possible for the current to be oscillatory

   B. The voltage across the resistor at t = 0⁺ is zero

   C. The energy stored in the inductor in the steady-state is zero

   D. The resistor current eventually falls to zero

28.  At ..........frequencies the parallel R-L circuit behaves as purely resistive.

   A. Low

   B. Very low

   C. High

   D. Very high

29.  The voltage applied across an R-L circuit is equal to..........of V_R and V_L

   A. Phasor sum

   B. Arithmetic sum

   C. Sum of the squares

   D.Algebraic sum

30.  The double energy transient occur in the

   A. Purely inductive circuit

   B. R - L circuit

   C. R - C circuit

   D. R - L - C circuit

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