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Power Electronics

Power Electronics
Thermal voltage VT can be given by

 KT/q.
 (K2/q)(T + 1/T - 1).
  Kq/T.
 qT/K.

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Power Electronics
A diac is ___________ switch

None of these
An c.
A d.c.
A mechanical

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Power Electronics
When the temperature increases, the inter-base resistance (RBB) of a UJT ___________.

None of these
Decreases
Increases
Remains the same

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

Gate voltage
None of these
Breakover voltage
Gate current

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Power Electronics
When the emitter terminal of a UJT is open, the resistance between the base terminal is generally ___________.

Low
High
Extremely low
None of these

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Power Electronics
Light triggering mainly used in

  high voltage direct current transmission.
 low - voltage direct current transmission.
 medium voltage direct current transmission.
  all of these.

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