Electrical Engineering MCQs

Page No. 112

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


aPositive

✓


b Negative

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cAt zero potential

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dNone of the above

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View Answer Positive

An SCR is sometimes called ____________?


a Triac

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bDiac

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cUnijunction transistor

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dThyristor

✓


View Answer Thyristor

An SCR is a solid state equivalent of ______________?


aTriode

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bPentode

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cGas-filled triode

✓


dTetrode

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View Answer Gas-filled triode

An SCR has three terminals viz ________________?


aCathode,Cathode, anode, gate anode, gate

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b Anode, cathode, grid

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cAnode, cathode, drain

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dNone of the above

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View Answer Cathode, anode, gate

An SCR is made of_______________?


aGermanium

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bSilicon

✓


cCarbon

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dNone of the above

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View Answer silicon

An SCR has ___________semiconductor layers?


aTwo

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bThree

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c Four

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dNone of the above

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View Answer Four

An SCR has __________ pn junctions?


aTwo

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b Three

✓


cFour

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dNone of the above

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View Answer Three

An SCR is turned off when ________________?


aAnode current is reduced to zero

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bGate voltage is reduced to zero

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cGate is reverse biased

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dNone of the above

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


aIs decreased

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b Is increased

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c Remains the same

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dNone of the above

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View Answer Is decreased

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


a Changing anode voltage

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bChanging gate voltage

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cReverse biasing the gate

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dNone of the above

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View Answer Changing gate voltage

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