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Power Electronics

Power Electronics
A triac has ___________ semiconductor layers.

Four
Three
Five
Two

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Power Electronics
SCRs are used in series to meet

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

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Power Electronics
Which of following devices has highest di/dt and dv/dt capability?

 SIT.
  GTO.
 SCR.
 SITH.

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Power Electronics
When a UJT is turned ON, the resistance between emitter terminal and lower base terminal ___________

Is increased
None of these
Remains the same
Is decreased

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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.
  8 KV.
 2 KV.
 10 KV.

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Power Electronics
A triac is a ___________ switch

Bidirectional
Unidirectional
Mechanical
None of these

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