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Power Electronics

Power Electronics
The typical time of rising time lies between

 90 - 100 µs.
  1 - 4 µs.
 40 - 60 µs.
 10 - 20 µs.

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Power Electronics
Which semiconductor device acts like a diode and two transistor?

 Diac.
 UJT.
 SCR.
  Triac.

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Power Electronics
A diac has ___________ pn junctions

Two
Three
None of these
Four

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Power Electronics
Leakage current flows through the thyristor in

 reverse blocking mode.
 forward blocking mode.
 forward conduction mode.
  both forward and reverse blocking mode.

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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

  37.14.
 3.714.
 60.
 65.

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Power Electronics
Under normal operating condition voltage clamping device offers impedance of

 zero value.
  high value.
 low value.
 moderate value.

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