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Power Electronics

Power Electronics
A diac is ___________ switch

A mechanical
An c.
None of these
A d.c.

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

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

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Power Electronics
A UJT is sometimes called ___________ diode.

Single-base
Double-base
Low resistance
High resistance

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

Equal to
None of these
Less than
More than

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Power Electronics
Figure shows two thyristors rated 400 A sharing a load current. Current through T2 is 180A. Current through T1 will be

  150 A.
 110 A.
 120 A.
 100 A.

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