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Power Electronics

Power Electronics
The latching current of GTO should be of order

 2 A.
  500 mA.
 1 A.
 100 mA.

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Power Electronics
What is used to protect the SCR from over current ?

 Snubber circuit.
 Heat sink.
 Voltage clamping device.
  CB and fuse.

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Power Electronics
When a UJT is turned ON, the resistance between emitter terminal and lower base terminal ___________

Is decreased
Remains the same
Is increased
None of these

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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

 65.
 60.
  37.14.
 3.714.

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

Increases
None of these
Decreases
Remains the same

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Power Electronics
Thermal voltage VT can be given by

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

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