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Power Electronics

Power Electronics
The latching current of GTO should be of order

 1 A.
  500 mA.
 2 A.
 100 mA.

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Power Electronics
Which one is most suitable power device for high frequency (>100 KHz) switching application?

 Schottky diode.
 BJT.
 Microwave transistor.
  Power MOSFET.

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Power Electronics
Figure shows two thyristors rated 400 A sharing a load current. Current through T2 is 180A. Current through T1 will be

 100 A.
 110 A.
  150 A.
 120 A.

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Power Electronics
Which of following is normally ON device

 TRIAC.
  SIT.
 IGBT.
 BJT.

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Power Electronics
Dynamic equalising circuit is useful

 for voltage equalisation.
  both B and C.
 to limit di / dt of SCR.
 to limit dV / dt of SCR.

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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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