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Power Electronics

Power Electronics
A diac has ___________ terminals.

Three
Two
Four
None of these

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

 SCR.
 SIT.
  GTO.
 SITH.

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Power Electronics
Compared to transistor, ______________ have lower on state conduction losses and higher power handling capability

 Semi conductor diodes.
  Thyristor.
 MOSFETs.
 TRIACs.

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Power Electronics
A diac is turned on by ___________.

A breakover voltage
None of these
Gate current
Gate voltage

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Power Electronics
During which time maximum conduction spreading take place in the thyristor during turn ON?

 Same for every case.
 Delay time.
  Spread time.
 Rise time.

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Power Electronics
Practical way of obtaining static voltage equalization in series connected SCRs is by the use of

  resistors of the same value across each SCR.
 resistors of different values across each SCR.
 one resistor in series with each SCR.
 one resistor across the string.

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