Electrical Engineering MCQs

Page No. 112

In normal operation of an SCR, gate is _____________w.r.t. cathode?


aPositive


b Negative


cAt zero potential


dNone of the above


View Answer Positive

An SCR is sometimes called ____________?


a Triac


bDiac


cUnijunction transistor


dThyristor


View Answer Thyristor

An SCR is a solid state equivalent of ______________?


aTriode


bPentode


cGas-filled triode


dTetrode


View Answer Gas-filled triode

An SCR has three terminals viz ________________?


aCathode,Cathode, anode, gate anode, gate


b Anode, cathode, grid


cAnode, cathode, drain


dNone of the above


View Answer Cathode, anode, gate

An SCR is made of_______________?


aGermanium


bSilicon


cCarbon


dNone of the above


View Answer silicon

An SCR has ___________semiconductor layers?


aTwo


bThree


c Four


dNone of the above


View Answer Four

An SCR has __________ pn junctions?


aTwo


b Three


cFour


dNone of the above


View Answer Three

An SCR is turned off when ________________?


aAnode current is reduced to zero


bGate voltage is reduced to zero


cGate is reverse biased


dNone of the above



If gate current is increased, then anode-cathode voltage at which SCR closes_________________?


aIs decreased


b Is increased


c Remains the same


dNone of the above


View Answer Is decreased

In an SCR circuit, the angle of conduction can be changed by__________________?


a Changing anode voltage


bChanging gate voltage


cReverse biasing the gate


dNone of the above


View Answer Changing gate voltage

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