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Power Electronics

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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Power Electronics
During reverse recovery time

 charge carrier of junction J1 is swept out.
  both B and C.
 charge carrier of junction J2 recombined.
 charge carrier of junction J3 is swept out.

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Power Electronics
A triac is equivalent to two SCRs ___________.

None of these
In series
In parallel
In inverse-parallel

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Power Electronics
The device that exhibits negative resistance region is ___________.

Diac
Transistor
UJT
Triac

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Power Electronics
For series connected SCR’s dynamic equalising circuit consists of

  R and C in series but with diode across R.
 series R and diode with C across R.
 R and C in series but with diode across C.
 series R and diode with C across R.

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Power Electronics
After peak point, the UJT operates in the ___________ region.

None of these
Cut-off
Saturation
Negative resistance

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