During reverse recovery time__________________?

Related Mcqs:

1. The reverse recovery time of diode is trr = 3 μs and the rate off all of the diode current is di/dt = 30 A/μs. The storage charge current QRR is___________?

   A. 130 μs
   B. 135 μs
   C. 140 μs
   D. 145 μs

2. During gate recovery time_____________?

   A. charge carriers of J2 junction recombined
   B. charge carriers of J2 junction is swept out
   C. charge carrier of J1 junction removed
   D. charge carriers of J3 junction is removed

3. In reverse blocking mode of a thyristor______?

   A. junction J2 is in reverse bias and J1, J3 is in forward bias.
   B. junction J3 is in forward bias and J1, J2 in reverse bias.
   C. junction J1, J3 is in reverse bias and J2 is in forward bias.
   D. junction J1 and J2 is in forward bias and J3 is in reverse bias.

4. Which of the following is disadvantage of fast recovery diodes?

   A. Recovery is only 5 µs
   B. Recovery is only 50 µs
   C. Doping is carried out
   D. None of these

5. During which time maximum conduction spreading take place in the thyristor during turn ON?

   A. Delay time
   B. Spread time
   C. Rise time
   D. Same for every case

6. Spread time is defined as the interval during which_____________?

   A. anode voltage drops from 10 % of its initial value to zero
   B. anode current rises from 90 % to its final value
   C. both (A) and (B)
   D. anode current rises from 10 % to 90 % of its final value

7. 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

8. During the commutation period in 3 phase converter, overlap time is_____________?

   A. Dependent on the load current
   B. Dependent on the voltage
   C. Dependent on both the load current and load voltage behind the short circuit current
   D. Independent on both the load current and load voltage

9. During the commutation period in 3 phase converter, overlap time is____________?

   A. Dependent on the load current
   B. Dependent on the voltage
   C. Dependent on both the load current and load voltage behind the short circuit current
   D. Independent on both the load current and load voltage

10. A single phase full bridge inverter can operate in load commutation mode in case load consists of____________?

    A. RL.
    B. RLC underdamped.
    C. RLC overdamped.
    D. RLC critically damped.