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Power Electronics

Power Electronics
A diac has ___________ terminals.

Four
Three
Two
None of these

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Power Electronics
The maximum di/dt in a SCR is

  Both A and B.
 Inversely proportional to supply voltage.
 Directly proportional to supply voltage.
 Directly proportional to inductance in the circuit.

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Power Electronics
In a UJT, the p-type emitter is ___________ doped

Heavily
Moderately
None of these
Lightly

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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.
  37.14.
 60.

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Power Electronics
After proper turn on of thyristor

 gate signal is always present.
 gate signal should present but can be removed.
None of these
  gate signal must be removed.

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

Saturation
Cut-off
Negative resistance
None of these

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