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Power Electronics

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
Which triggering is the most reliable?

  Forward voltage triggering.
  dV / dt triggering.
  Thermal triggering.
  Gate triggering.

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Power Electronics
A modern power semiconductor device that combines the characteristic of BJT and MOSFET is

 GTO.
  IGBT.
 MCT.
 FCT.

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Power Electronics
For an SCR gate cathode characteristic is a straight line of 130. For triggered source volume of 15 V and allowable gate power dissipation of 0.5 W compute the gate source resistance?

 115 ohm
  111.9 ohm
 11.19 ohm
 108 ohm

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Power Electronics
The device that exhibits negative resistance region is ___________.

Transistor
Triac
UJT
Diac

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Power Electronics
What may happen high dV / dt?

  Both A and B.
 Unwanted turn ON.
 Breakdown of J2 junction.
 Anyone of these.

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