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

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

A. 90o

B. 45o lag

B. 45o lag

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

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

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

A. Low

B. Very low

C. High

D. Very high

D. Very high

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

A. Phasor sum

B. Arithmetic sum

C. Sum of the squares

D.Algebraic sum

A. Phasor 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