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Power Electronics

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.
 120 A.
  150 A.

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Power Electronics
Snubber circuit is used with SCR

 anti parallel.
  in parallel.
 either series or parallel.
 in series.

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Power Electronics
When the emitter terminal of a UJT is open, the resistance between the base terminal is generally ___________.

High
None of these
Low
Extremely low

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Power Electronics
SCRs are used in series to meet

  high voltage demand.
 low voltage demand.
 low current demand.
 high current demand.

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Power Electronics
Calculate the maximum voltage that can be safely blocked by the string shown in figure, if maximum allowable leakage current is 2 mA?

 6 KV.
 2 KV.
  8 KV.
 10 KV.

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Power Electronics
For series connected SCR’s dynamic equalising circuit consists of

 series R and diode with C across R.
 series R and diode with C across R.
  R and C in series but with diode across R.
 R and C in series but with diode across C.

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