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Power Electronics

Power Electronics
A diac is turned on by ___________.

Gate current
Gate voltage
None of these
A breakover voltage

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

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Power Electronics
A single phase full bridge inverter can operated in load commutation mode in case load consist of

 RLC underdamped.
 RLC overdamped.
 RL.
 RLC critically damped.

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

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

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

Both positive and negative
Only positive
Only negative
None of these

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Power Electronics
Compared to transistor, ______________ have lower on state conduction losses and higher power handling capability

 TRIACs.
 Semi conductor diodes.
  Thyristor.
 MOSFETs.

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