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Power Electronics

Power Electronics
A thyristor will be triggered when Vg = 1.5 volt and Ig = 100 mA in the given figure. Calculate the value of R in ohm is

  37.14.
 65.
 60.
 3.714.

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Power Electronics
The typical time of rising time lies between

  1 - 4 µs.
 10 - 20 µs.
 90 - 100 µs.
 40 - 60 µs.

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Power Electronics
Why resistor is used in Snubber circuit ?

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

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Power Electronics
Which of following is not a power transistor?

 SITS.
 IGBTs.
 COOLMOS.
  TRIAC.

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Power Electronics
A UJT is sometimes called ___________ diode.

Single-base
Double-base
High resistance
Low resistance

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Power Electronics
Which of following devices has highest di/dt and dv/dt capability?

 SITH.
 SIT.
  GTO.
 SCR.

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