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Power Electronics

Power Electronics
If holding current of a thyristor is 2 mA then latching current should be

 0.01 A.
 0.002 A.
  0.004 A.
 0.009 A.

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Power Electronics
A diac has ___________ pn junctions

None of these
Two
Four
Three

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

Is decreased
None of these
Remains the same
Is increased

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Power Electronics
The capacitance of reversed bised junction J2 in a thyristor is CJ2 = 20 pF and can be assumed to be independant of the off state voltage. The limiting value of the charging current to turn on the thyristor is 16 mA. What is the critical value of dv/dt?

  800 V/µs.
 600 V/µs.
 1200 V/µs.
 1000 V/µs.

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Power Electronics
SITH is also known as

 None of these.
 Silicon controlled rectifier.
 Filled controlled rectifier.
  Filled controlled diode.

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Power Electronics
Gate circuit or triggering circuit of a thyristor is

 magnetic circuit.
 high power circuit.
  lower power circuit.
 may be low power or high power circuit.

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