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

Related Mcqs:

1. In a series L-C circuit at the resonant frequency the__________?

   A. current is maximum
   B. current is minimum
   C. impedance is maximum
   D. voltage across C is minimum

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

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

3. In series resonant circuit, increasing inductance to its twice value and reducing capacitance to its half value__________?

   A. will change the maximum value of current at resonance
   B. will change the resonance frequency
   C. will change the impedance at resonance frequency
   D. will increase the selectivity of the circuit

4. 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

5. Magnitude of current at resonance in R-L-C circuit________?

   A. depends upon the magnitude of R
   B. depends upon the magnitude of L
   C. depends upon the magnitude of C
   D. depends upon the magnitude of R, Land C

6. Which of the following coil will have large resonant frequency __________?

   A. A coil with large resistance
   B. A coil with low resistance
   C. A coil with large distributed capacitance
   D. A coil with low distributed capacitance

7. 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

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

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

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

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

10. 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