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Power Electronics

Power Electronics
The UJT may be used as ___________.

A rectifier
None of these
Am amplifier
A sawtooth generator

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

 Diac.
  Triac.
 SCR.
 UJT.

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

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

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Power Electronics
Which following is a two terminal three layer device?

 BJT.
  Power dioed.
 MOSFET.
 None of above.

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

None of these
Only negative
Only positive
Both positive and negative

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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

 60.
 3.714.
  37.14.
 65.

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