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Power Electronics

Power Electronics
A diac is turned on by ___________.

Gate current
Gate voltage
None of these
A breakover voltage

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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.
  37.14.
 60.
 3.714.

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Power Electronics
Snubber circuit is used with SCR

 in series.
  in parallel.
 anti parallel.
 either series or parallel.

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Power Electronics
Which of the following is not a characteristic of UJT?

Intrinsic stand off ratio
Negative resistance
Bilateral conduction
Peak-point voltage

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Power Electronics
Example of a voltage clamping device

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

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Power Electronics
To turn on UJT, the forward bias on the emitter diode should be ___________ the peak point voltage.

None of these
Less than
More than
Equal to

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