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

Related Mcqs:

1. At very low frequencies a series R-C circuit behaves as almost purely___________?

   A. resistive
   B. inductive
   C. capacitive
   D. none of the above

2. In a pure resistive circuit__________?

   A. current lags behind the voltage by 90°
   B. current leads the voltage by 90°
   C. current can lead or lag the voltage by 90°
   D. current is in phase with the voltage

3. In a purely inductive circuit__________?

   A. actual power is zero
   B. reactive power is zero
   C. apparent power is zero
   D. none of above is zero

4. The power factor at resonance in R-L- C parallel circuit is________?

   A. zero
   B. 0.08 lagging
   C. 0.8 leading
   D. unity

5. The series and parallel resonance on L-C circuit’ differs in that_________?

   A. series resistance needs a low-resistance source for sharp rise in current
   B. series resonance needs a high-resistance source for sharp increase in current
   C. parallel resonance needs a low-resistance source for a sharp in¬crease in impedance
   D. parallel resonance needs a low-resistance source for a sharp rise in line current

6. Which of the following refers to a parallel circuit ?

   A. The current through each element is same
   B. The voltage across element is in proportion to it’s resistance value
   C. The equivalent resistance is greater than any one of the resistors
   D. The current through any one element is less than the source current

7. In a parallel R-C circuit, the current always________the applied voltage?

   A. lags
   B. leads
   C. remains in phase with
   D. none of the above

8. The purpose of a parallel circuit resonance is to magnify________?

   A. current
   B. voltage
   C. power
   D. frequency

9. A parallel AC. circuit in resonance will__________?

   A. have a high voltage developed across each inductive and capacitive section
   B. have a high impedance
   C. act like a resistor of low value
   D. have current in each section equal to the line current

10. All the rules and laws of D.C. circuit also apply to A.C. circuit containing_____________?

    A. capacitance only
    B. inductance only
    C. resistance only
    D. all above