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Power Electronics

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

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

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Power Electronics
The normal way to turn on a diac is by ___________.

Gate voltage
Gate current
None of these
Breakover voltage

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Power Electronics
The latching current of GTO should be of order

 1 A.
 2 A.
  500 mA.
 100 mA.

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

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

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Power Electronics
Latching current for an SCR inserted between a dc voltage source of 200 V and load is 100 mA. Compute the minimum rate of width pulse required to turn ON the SCR in case load consists of R = 20 Ω in series with L = 0.2 H.

 300 µs.
  100 µs.
 150 µs.
 200 µs.

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

  Thyristor.
 TRIACs.
 Semi conductor diodes.
 MOSFETs.

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