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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
To turn on UJT, the forward bias on the emitter diode should be ___________ the peak point voltage.

More than
Equal to
Less than
None of these

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Power Electronics
4 thyristors rated 200 V in series. The operating voltage of the string is 0.600 V. Derating factor of the string is

 0.2.
 0.75.
 0.7.
  0.25.

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Power Electronics
IGBT combines the advantages of

 BJTs and SITs.
 None of these.
 SITs and MOSFETs.
  BJTs and MOSFETs.

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Power Electronics
Which of following is normally ON device

  SIT.
 BJT.
 TRIAC.
 IGBT.

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Power Electronics
A triac can pass a portion of ___________ half-cycle through the load.

Both positive and negative
Only positive
None of these
Only negative

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