When the temperature increases, the inter-base resistance (RBB) of a UJT ___________.
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Power Electronics
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Power electronics essentially deals with control of a.c. power at ___________.
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A DIAC is ___________ switch.
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A diac is simply ___________.
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A triac has ___________ semiconductor layers.
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A diac has ___________ semiconductor layers
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When a UJT is turned ON, the resistance between emitter terminal and lower base terminal ___________
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The triac is ___________.
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A triac is equivalent to two SCRs ___________.
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An SCR is a . . . . . . . . triggered device
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SMPS normally use Ferrite core transformers in place of Iron core because of
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Which of the following devices does not have negative resistance characteristics
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Inverters find applications in
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A diac has . . . . . . . . terminals
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In controlled rectifiers, the nature of load current is continuous or discontinuous
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The operating state that distinguishes a silicon controlled rectifier (SCR) from a diode is
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For a type A chopper, DC source voltage is 240 V. Calculate the average output voltage is the duty cycle is 0.4. Take a voltage drop of 4 V across the chopper when it is on.
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If firing angle in an SCR circuit is increased, the output . . . . . . . .
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In a thyristor, the minimum current required to maintain the device in the 'ON' state is called
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For a single phase fully controlled converter bridge operating with continuous load current, the converter will operate in inverting mode for triggering angle, , such that:
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