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Power Electronics

Power Electronics
A triac has ___________ semiconductor layers.

Three
Two
Five
Four

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Power Electronics
A UJT is sometimes called ___________ diode.

Double-base
High resistance
Low resistance
Single-base

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Power Electronics
A power semiconductor may undergo damage due to

 Low dv/dt.
  High di/dt.
 Low di/dt.
 High dv/dt.

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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?

 3.2 µs
 3 µs.
 3.1 µs
  3.3 µs

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Power Electronics
An SCR has half cycle surge current rating of 3000 A for 50 Hz supply. One cycle surge current will be

 6000 A.
 4242.64 A.
 2121.32 A.
 1500 A.

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Power Electronics
Typical range of thyristor turn OFF time is

 3 - 500 µs.
 3 - 50 µs.
 3 - 10 µs.
  3 - 100 µs.

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