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Power Electronics

Power Electronics
The UJT may be used as ___________.

Am amplifier
A rectifier
A sawtooth generator
None of these

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Power Electronics
What happen due to high di / dt?

 None of these.
 Breakdown of junction.
  Local hot spot.
 Insulation failure.

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Power Electronics
Example of a voltage clamping device

 snubber circuit.
 aluminium block.
  metal oxide varistor.
 fast acting fuse.

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Power Electronics
A diac is turned on by ___________.

A breakover voltage
Gate voltage
Gate current
None of these

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Power Electronics
A power semiconductor may undergo damage due to

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

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Power Electronics
Switching frequency of SITH is

 5 KHz.
  100 KHz.
 60 KHz.
 10 KHz.

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