Vidyalelo
ECE · all questions

Power Electronics
practice.

Practice every MCQ with options. Use Show answers when you want the correct option and solution.

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A UJT has ___________.

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The UJT may be used as ___________.

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A diac has ___________ pn junctions

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A diac has ___________ terminals.

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A triac is a ___________ switch

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The normal way to turn on a diac is by ___________.

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Which of the following is not a characteristic of UJT?

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A triac can pass a portion of ___________ half-cycle through the load.

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Between the peak point and the valley point of UJT emitter characteristics we have ___________ region

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After peak point, the UJT operates in the ___________ region.

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

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A UJT is sometimes called ___________ diode.

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A diac is turned on by ___________.

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The device that exhibits negative resistance region is ___________.

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

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When the temperature increases, the intrinsic stand off ratio ___________.

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In a UJT, the p-type emitter is ___________ doped

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The device that does not have the gate terminal is ___________.

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The V-I characteristics for a triac in the first and third quadrants are essentially identical to those of ___________ in its first quadrant

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A Triac has three terminals viz ___________

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