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MCQs 1: In normal operation of an SCR, gate is _____________w.r.t. cathode?

Positive Negative At zero potential None of the above
Answer Explanation

MCQs 2: An SCR is sometimes called ____________?

Triac Diac Unijunction transistor Thyristor
Answer Explanation

MCQs 3: An SCR is a solid state equivalent of ______________?

Triode Pentode Gas-filled triode Tetrode
Answer Explanation

MCQs 4: An SCR has three terminals viz ________________?

Cathode, anode, gate Anode, cathode, grid Anode, cathode, drain None of the above
Answer Explanation

MCQs 5: An SCR is made of_______________?

Germanium Silicon Carbon None of the above
Answer Explanation

MCQs 6: An SCR has ___________semiconductor layers?

Two Three Four None of the above
Answer Explanation

MCQs 7: An SCR has __________ pn junctions?

Two Three Four None of the above
Answer Explanation

MCQs 8: An SCR is turned off when ________________?

Anode current is reduced to zero Gate voltage is reduced to zero Gate is reverse biased None of the above
Answer Explanation

MCQs 9: If gate current is increased, then anode-cathode voltage at which SCR closes_________________?

Is decreased Is increased Remains the same None of the above
Answer Explanation

MCQs 10: In an SCR circuit, the angle of conduction can be changed by__________________?

Changing anode voltage Changing gate voltage Reverse biasing the gate None of the above
Answer Explanation

MCQs 11: When SCR is OFF, the current in the circuit is ________________?

Exactly zero Small leakage current Large leakage current None of the above
Answer Explanation

MCQs 12: We can control a.c. power in a load by connecting ______________?

Two SCRs in series Two SCRs in parallel Two SCRs in parallel opposition None of the above
Answer Explanation

MCQs 13: If firing angle in an SCR circuit is increased, the output _____________?

Remains the same Is increased Is decreased None of the above
Answer Explanation

MCQs 14: An SCR can exercise control over____________of a.c. supply?

Positive half-cycles only Negative half-cycles only Both positive and negative half-cycles Positive or negative half-cycles
Answer Explanation

MCQs 15: When SCR starts conducting, then _____________ loses all control?

Gate Cathode Anode None of the above
Answer Explanation

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