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Power Electronics

Power Electronics
The latching current of SCR is 20 mA. Its holding current will be

 40 mA.
 23 mA.
 60 mA.
  10 mA.

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Power Electronics
The triac is ___________.

A four-terminal device
None of these
Like a bidirectional SCR
Not a thyristor

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Power Electronics
Calculate the maximum voltage that can be safely blocked by the string shown in figure, if maximum allowable leakage current is 2 mA?

 6 KV.
 10 KV.
  8 KV.
 2 KV.

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

 MOSFETs.
 Semi conductor diodes.
 TRIACs.
  Thyristor.

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Power Electronics
Thyristor can be protected from over voltages by using

  voltage clamping device.
 heat sink.
 snubber circuit.
 fuse.

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Power Electronics
Leakage current flows through the thyristor in

  both forward and reverse blocking mode.
 reverse blocking mode.
 forward conduction mode.
 forward blocking mode.

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