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Power Electronics

Power Electronics
IGBT combines the advantages of

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

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Power Electronics
Thermal voltage VT can be given by

  Kq/T.
 qT/K.
 (K2/q)(T + 1/T - 1).
 KT/q.

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Power Electronics
How can we protect SCR from thermal conditions ?

 Use of snubber circuit.
  Using heat sink.
 Using CB and fuse.
 Using equalizing circuit.

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

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

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Power Electronics
A UJT is sometimes called ___________ diode.

Single-base
Double-base
Low resistance
High resistance

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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?

 108 ohm
  111.9 ohm
 115 ohm
 11.19 ohm

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