# In the figure, if C = 8 F and L = 0.2 mH and V0 = 200V, then peak current through diode is given by

1.  40 A

2.  50 A

3.  10 A

4.  30 A

4

40 A

Explanation :
No Explanation available for this question

# A single-phase bridge converter is used to charge a battery of 200 V having an internal resistance of 0.2 Ω as shown in figure. The SCR are triggered by a constant dc signal. If SCR gets open circuited, then what will be the average charging current

1.  23.8 A

2.  15 A

3.  11.9 A

4.  3.54 A

4

23.8 A

Explanation :
No Explanation available for this question

# In a conventional reverse blocking thyristor

1.  external layers are lightly doped and internal layers are heavily doped

2.  external layers are heavily doped and internal layers are lightly doped

3.  the p-layers are heavily doped and then n-layers are lightly doped

4.  the p-layers are lightly doped and then n-layers are heavily doped.

4

the p-layers are lightly doped and then n-layers are heavily doped.

Explanation :
No Explanation available for this question

# In order to obtain static voltage equalization in series-connected SCRs, connections are made of

1.  one resistor across the string

2.  resistors of different values across each SCR

3.  resistors of the same value across each SCR

4.  one resistor in series with the string.

4

resistors of the same value across each SCR

Explanation :
No Explanation available for this question

# When a thyristor is negatively biased

1.  all the three junctions are negatively biased

2.  outer junctions are positively biased and the inner junction is negatively biased

3.  outer junctions are negatively biased and the inner junction is positively biased

4.  the junction near the anode is negatively biased and the one near the cathode is positively biased.

4

outer junctions are negatively biased and the inner junction is positively biased

Explanation :
No Explanation available for this question

# MOS controlled thyristors have Low forward voltage drop during conduction Fast turn-on and turn-off time Low switching losses High reverse voltage blocking capability Low gate input impedance Of these statements

1.  1, 2 and 3 are correct

2.  3, 4 and 5 are correct

3.  2, 3 and 4 are correct

4.  1, 3 and 5 are correct

4

1, 2 and 3 are correct

Explanation :
No Explanation available for this question

# A schottky diode is a

1.  majority carrier device

2.  minority carrier device

3.  fast recovery diode

4.  both a majority and a minority carrier diode

4

majority carrier device

Explanation :
No Explanation available for this question

# Optocouplers combine

1.  SITs and BJTs

2.  IGBTs and MOSFETs

3.  Power transformers and silicon transistor

4.  Infrared light-emitting diode and a silicon

4

Infrared light-emitting diode and a silicon

Explanation :
No Explanation available for this question

# A switched mode power supply operating at 20 kHz to 100 kHz range uses which of the following as the main switching element

1.  Thyristor

2.  MOSFET

3.  Triac

4.  UJT

4

MOSFET

Explanation :
No Explanation available for this question

1.  Thyristor

2.  G.T.O.

3.  Triac

4.   MOSFET

4