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___________?

Related Mcqs:

1. During reverse recovery time__________________?

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

2. An ideal diode is___________?

   A. Unidirectional
   B. Bidirectional
   C. Fixed voltage polarity
   D. Only (a) and (c)

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 semiconductor device acts like a diode and two transistor?

   A. UJT
   B. Diac
   C. Triac
   D. SCR

5. 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

6. For a buck converter to reduce the conduction losses in diode

   A. A high on – resistance switch can be added in parallel
   B. A low on – resistance switch can be added in parallel
   C. A high on – resistance switch can be added in series
   D. A low on – resistance switch can be added in series

7. The advantage of using free – wheeling diode in half controlled bridge converter is that

   A. There is always a path for the dc current independent of the ac line
   B. There is always a path for the ac current independent of the ac line
   C. There is always a path for the dc current dependent of the ac line
   D. There is always a path for the ac current independent of the ac line

8. 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

9. 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

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