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Power Electronics

Power Electronics
Under over voltage condition impedance offered by the voltage clamping device is

 infinity.
  low.
 moderate.
 high.

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Power Electronics
A power semiconductor may undergo damage due to

 Low dv/dt.
 Low di/dt.
 High dv/dt.
  High di/dt.

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Power Electronics
Maximum power loss occurs during

 all.
 spread time.
  rise time.
 delay time.

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Power Electronics
Leakage current flows through the thyristor in

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

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Power Electronics
Typical range of thyristor turn OFF time is

 3 - 10 µs.
  3 - 100 µs.
 3 - 500 µs.
 3 - 50 µs.

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Power Electronics
A UJT has ___________.

Two pn junctions
Three pn junctions
None of these
One pn junction

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