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Power Electronics

Power Electronics
The latching current of GTO should be of order

  500 mA.
 2 A.
 1 A.
 100 mA.

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Power Electronics
What is used to protect a thyristor from high di / dt conditions?

 Fuse.
 Voltage clamping device.
 Snubber circuit.
  Inductor.

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Power Electronics
Snubber circuit is used with SCR

 either series or parallel.
  in parallel.
 in series.
 anti parallel.

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Power Electronics
Figure shows two thyristors rated 400 A sharing a load current. Current through T2 is 180A. Current through T1 will be

 110 A.
 120 A.
 100 A.
  150 A.

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Power Electronics
How can we protect SCR from thermal conditions ?

 Using equalizing circuit.
 Using CB and fuse.
 Use of snubber circuit.
  Using heat sink.

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Power Electronics
A power semiconductor may undergo damage due to

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

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MORE MCQ ON Power Electronics

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