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

Related Mcqs:

1. 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

2. A full wave rectifier with resistive load produces___________?

   A. Second harmonic
   B. Third harmonic
   C. Fifth harmonic
   D. Do not produce harmonics

3. In a 3 phase half wave rectifier, when firing angle is less than 90 degree, then the average dc output voltage becomes__________________?

   A. Positive
   B. Negative
   C. Zero
   D. None of these

4. Form factor of a rectifier is the ratio of ______________?

   A. Root mean square value of voltage and current to its peak value
   B. Root mean square value of voltage and current to its average value
   C. Average value of current and voltage to its root mean square value
   D. Peak value of current and voltage to its root mean square value

5. 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

6. Electrical power output in a d.c. generator is equal to____________?

   A. Electrical power developed in armature – copper losses
   B. Mechanical power input – iron and friction losses
   C. Electrical power developed in armature – iron and copper losses
   D. Mechanical power input – iron and friction losses – copper losses

7. 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

8. 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)

9. 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)

10. 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