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Power Electronics

Power Electronics
A diac is ___________ switch

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

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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
A triac has ___________ semiconductor layers.

Three
Two
Four
Five

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Power Electronics
When the emitter terminal of a UJT is open, the resistance between the base terminal is generally ___________.

Extremely low
High
None of these
Low

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Power Electronics
A step up chopper has input voltage 110 V and output voltage 150 V. The value of duty cycle is

  0.67.
  0.32.
  0.27.
  0.45.

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Power Electronics
The UJT may be used as ___________.

None of these
Am amplifier
A rectifier
A sawtooth generator

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