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Power Electronics

Power Electronics
Under over voltage condition impedance offered by the voltage clamping device is

  low.
 high.
 moderate.
 infinity.

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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

 0.7.
 0.75.
 0.2.
  0.25.

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Power Electronics
A triac is equivalent to two SCRs ___________.

None of these
In series
In parallel
In inverse-parallel

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Power Electronics
IGBT combines the advantages of

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

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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?

 11.19 ohm
  111.9 ohm
 115 ohm
 108 ohm

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Power Electronics
The device that does not have the gate terminal is ___________.

SCR
FET
Diac
Triac

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