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POWER ELECTRONICS

Power Electronics
A diac has ___________ semiconductor layers

None of these
Four
Two
Three

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Power Electronics
When a UJT is turned ON, the resistance between emitter terminal and lower base terminal ___________

Is decreased
Remains the same
None of these
Is increased

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Power Electronics
The triac is ___________.

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

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Power Electronics
A triac is equivalent to two SCRs ___________.

None of these
In parallel
In series
In inverse-parallel

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Power Electronics
A UJT has ___________.

Two pn junctions
None of these
Three pn junctions
One pn junction

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