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Power Electronics

Power Electronics
A thyristor will be triggered when Vg = 1.5 volt and Ig = 100 mA in the given figure. Calculate the value of R in ohm is

 3.714.
 65.
 60.
  37.14.

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Power Electronics
The latching current of GTO should be of order

 2 A.
 1 A.
 100 mA.
  500 mA.

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Power Electronics
To meet high current demand we use SCRs in

  parallel connection.
 both B and C.
 anti parallel connection.
 series connection.

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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?

  8 KV.
 6 KV.
 2 KV.
 10 KV.

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Power Electronics
Between the peak point and the valley point of UJT emitter characteristics we have ___________ region

Negative resistance
Saturation
Cut-off
None of these

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Power Electronics
Why resistor is used in Snubber circuit ?

 To minimize the loss .
 All of these.
  To minimize the discharging current.
 To minimize the charging current.

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