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

Remains the same
Decreases
None of these
Increases

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Power Electronics
A GTO can be turned on by applying

 None of these.
 Positive source signal.
 Positive drain signal.
  Positive gate signal.

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Power Electronics
Thyristor can be protected from over voltages by using

  voltage clamping device.
 snubber circuit.
 heat sink.
 fuse.

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Power Electronics
For an SCR gate cathode characteristic is a straight line of 130. For triggered source volume of 15 V and allowable gate power dissipation of 0.5 W compute the gate source resistance?

 11.19 ohm
 115 ohm
  111.9 ohm
 108 ohm

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

None of these
Gate voltage
Gate current
Breakover voltage

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