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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

  37.14.
 3.714.
 60.
 65.

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Power Electronics
Which one is most suitable power device for high frequency (>100 KHz) switching application?

 BJT.
 Microwave transistor.
 Schottky diode.
  Power MOSFET.

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Power Electronics
Which triggering is the most reliable?

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

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Power Electronics
The maximum di/dt in a SCR is

 Inversely proportional to supply voltage.
 Directly proportional to inductance in the circuit.
 Directly proportional to supply voltage.
  Both A and B.

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Power Electronics
The triac is ___________.

Like a bidirectional SCR
None of these
Not a thyristor
A four-terminal device

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Power Electronics
BCT is used for

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

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