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Power Electronics

Power Electronics
The typical value of SCR for modern alternator is

 1.5.
 0.5.
 1.2.
 1.0.

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Power Electronics
A diac has ___________ pn junctions

Two
None of these
Four
Three

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

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

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

 Diac.
 UJT.
  Triac.
 SCR.

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Power Electronics
If a latching current for the circuit shown in figure is 2 mA. Obtain the value of minimum width of the property turn ON the SCR?

 3 µs.
 3.1 µs
  3.3 µs
 3.2 µs

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Power Electronics
An SCR has half cycle surge current rating of 3000 A for 50 Hz supply. One cycle surge current will be

 2121.32 A.
 1500 A.
 4242.64 A.
 6000 A.

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