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Power Electronics

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

Less than
None of these
More than
Equal to

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Power Electronics
BCT is used for

  High power phase control.
 Low power current control.
 Low power phase control.
 High power current control.

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Power Electronics
The V-I characteristics for a triac in the first and third quadrants are essentially identical to those of ___________ in its first quadrant

UJT
None of these
Transistor
SCR

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Power Electronics
Which statement is true for latching current ?

  It is related to turn on process of the device.
 It is related to conduction process of device.
 It is related to turn off process of the device.
 Both C and D.

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Power Electronics
Which triggering is the most reliable?

  Thermal triggering.
  Gate triggering.
  Forward voltage triggering.
  dV / dt triggering.

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Power Electronics
A UJT is sometimes called ___________ diode.

Double-base
Low resistance
High resistance
Single-base

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