A rectifier with an external low pass filter is an example of______________?

Related Mcqs:

1. In a silicon controlled rectifier, the load is connected___________?

   A. Across anode
   B. In series with anode
   C. Across cathode
   D. In series with cathode

2. In a single phase full wave rectifier, during blocking state the pea inverse voltage of diode is______________?

   A. V m
   B. 2 V m
   C. V m / 2
   D. 4 V m

3. In a full wave rectifier, the rectification ratio is approximately equal to____________?

   A. 61%
   B. 71%
   C. 81%
   D. 91%

4. For power output higher than 15 kW, the suitable rectifier is________________?

   A. Single phase
   B. 3 phase
   C. Poly phase
   D. Only (b) and (c)

5. In a 3 phase bridge rectifier the ripple frequency is _____________?

   A. Equal to the input frequency
   B. Twice the input frequency
   C. Three times the input frequency
   D. Six times the input frequency

6. Due to non sinusoidal waveform of the input current, the power factor of the rectifier is____________?

   A. Negatively affected by firing angle
   B. Negatively affected by distortion of the input current
   C. Positively affected by both firing angle and distortion of the input current
   D. Both (a) and (b)

7. The input current waveform of a bridge controlled rectifier when the load is perfectly filtered is___________?

   A. Sine wave
   B. Square wave
   C. Saw – tooth wave
   D. Trapezoidal wave

8. Silicon controlled rectifier can be turned on____________?

   A. By applying a gate pulse and turned off only when current becomes zero
   B. And turned off by applying gate pulse
   C. By applying a gate pulse and turned off by removing the gate pulse
   D. By making current non zero and turned off by making current zero

9. Transformer utilization factor is a measure of the merit of a rectifier circuit. It is the ratio of_______________?

   A. AC input power to the transformer volt – amp rating required by secondary
   B. AC input power to the transformer volt – amp rating required by primary
   C. DC output power to the transformer volt – amp rating required by secondary
   D. DC output power to the transformer volt – amp rating required by primary

10. If the firing angle becomes negative, then the rectifier begins to work as_______________?

    A. A rectifier
    B. An inverter
    C. A chopper
    D. A regulator