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Power Electronics

Power Electronics
COOLMOS device can be used in application up to power range of

 500 VA.
  2 KVA.
 100 KVA.
 1 KVA.

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Power Electronics
Light triggering mainly used in

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

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Power Electronics
The device that exhibits negative resistance region is ___________.

Transistor
Triac
Diac
UJT

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

Remains the same
None of these
Increases
Decreases

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Power Electronics
A thyristor will be triggered when Vg = 1.5 volt and Ig = 100 mA in the given figure. Calculate the value of R in ohm is

  37.14.
 60.
 65.
 3.714.

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Power Electronics
Practical way of obtaining static voltage equalization in series connected SCRs is by the use of

 resistors of different values across each SCR.
  resistors of the same value across each SCR.
 one resistor in series with each SCR.
 one resistor across the string.

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