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

Related Mcqs:

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

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

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

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

3. 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

4. In R-L-C series resonant circuit magnitude of resonance frequency can be changed by changing the value of__________?

   A. R only
   B. L only
   C. C only
   D. LorC
   E. R,LorC

5. In a series resonant circuit, the impedance of the circuit is___________?

   A. minimum
   B. maximum
   C. zero
   D. none of the above

6. If resistance is 20 Q. and inductance is 27 in a R-L series circuit, then time constant of this circuit will be________?

   A. 0.001 s
   B. 0.1 s
   C. 10 s
   D. 100 s

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

   A. low
   B. very low
   C. high
   D. very high

8. 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

9. 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

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