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Power Electronics

Power Electronics
The triac is ___________.

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

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Power Electronics
ON state voltage drop across SCR lie between the range

 0.5 - 1 V.
  1 - 1.5 V.
 0 - 0.5 V.
 1.5 - 2 V.

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Power Electronics
Which of the following is not a characteristic of UJT?

Peak-point voltage
Intrinsic stand off ratio
Bilateral conduction
Negative resistance

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

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

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

Equal to
Less than
None of these
More than

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

 Microwave transistor.
 BJT.
 Schottky diode.
  Power MOSFET.

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