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Power Electronics

Power Electronics
ON state voltage drop across SCR lie between the range

  1 - 1.5 V.
 0.5 - 1 V.
 0 - 0.5 V.
 1.5 - 2 V.

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

 UJT.
  Triac.
 Diac.
 SCR.

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Power Electronics
Typical range of thyristor turn OFF time is

 3 - 50 µs.
 3 - 10 µs.
 3 - 500 µs.
  3 - 100 µs.

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Power Electronics
A triac can pass a portion of ___________ half-cycle through the load.

Only positive
Only negative
Both positive and negative
None of these

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Power Electronics
When the emitter terminal of a UJT is open, the resistance between the base terminal is generally ___________.

Low
Extremely low
High
None of these

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Power Electronics
If holding current of a thyristor is 2 mA then latching current should be

 0.01 A.
 0.002 A.
  0.004 A.
 0.009 A.

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