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Power Electronics

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

 60 mA.
 40 mA.
 23 mA.
  10 mA.

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

 Schottky diode.
 Microwave transistor.
  Power MOSFET.
 BJT.

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Power Electronics
Power transistor are type of

 BJTs.
  All of above.
 IGBTs.
 MOSFETs.

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Power Electronics
In a UJT, the p-type emitter is ___________ doped

None of these
Moderately
Heavily
Lightly

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Power Electronics
For series connected SCR’s dynamic equalising circuit consists of

 series R and diode with C across R.
 R and C in series but with diode across C.
 series R and diode with C across R.
  R and C in series but with diode across R.

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Power Electronics
Why resistor is used in Snubber circuit ?

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

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