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Power Electronics

Power Electronics
Figure shows two thyristors rated 400 A sharing a load current. Current through T2 is 180A. Current through T1 will be

 110 A.
  150 A.
 100 A.
 120 A.

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Power Electronics
A string of n parallel SCRs is operated at 72 KA, the rating of each SCR is 1 KA. If derating factor of the string is 0.1. Then calculate the value of n

  80.
 60.
 90.
 70.

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Power Electronics
Why resistor is used in Snubber circuit ?

 To minimize the charging current.
 To minimize the loss .
  To minimize the discharging current.
 All of these.

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Power Electronics
Which one is most suitable power device for high frequency (>100 KHz) switching application?

 Microwave transistor.
 Schottky diode.
  Power MOSFET.
 BJT.

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Power Electronics
If a latching current for the circuit shown in figure is 2 mA. Obtain the value of minimum width of the property turn ON the SCR?

 3.2 µs
 3.1 µs
 3 µs.
  3.3 µs

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Power Electronics
The latching current of SCR is 20 mA. Its holding current will be

  10 mA.
 23 mA.
 60 mA.
 40 mA.

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