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Power Electronics

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

 60.
 65.
 3.714.
  37.14.

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Power Electronics
If a latching current for the circuit shown in figure is 2 mA. Obtain the value of minimum width of the property turn ON the SCR?

  3.3 µs
 3.2 µs
 3.1 µs
 3 µs.

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

Gate voltage
Breakover voltage
None of these
Gate current

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Power Electronics
Under normal operating condition voltage clamping device offers impedance of

 moderate value.
 zero value.
  high value.
 low value.

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Power Electronics
The latching current of SCR is 20 mA. Its holding current will be

 60 mA.
  10 mA.
 40 mA.
 23 mA.

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Power Electronics
CB used for over current protection of thyristor operates when the fault current is

 neither (A) nor (B).
  of long period.
 of short duration.
 both (A) and (B).

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