Power Electronics A string of n parallel SCRs is operated at 72 KA, the rating of each SCR is 1 KA. If derating factor of the string is 0.1. Then calculate the value of n 70. 80. 60. 90. 70. 80. 60. 90. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics The triac is ___________. None of these A four-terminal device Not a thyristor Like a bidirectional SCR None of these A four-terminal device Not a thyristor Like a bidirectional SCR ANSWER DOWNLOAD EXAMIANS APP
Power Electronics A UJT has ___________. Two pn junctions One pn junction Three pn junctions None of these Two pn junctions One pn junction Three pn junctions None of these ANSWER DOWNLOAD EXAMIANS APP
Power Electronics Rise time is defined by the interval when anode voltage drops from 90 % to 10 % of its initial value. both B and C. anode current rises 10 % to 90 % of its final value. gate current rises from 90 % to 100 % of it final value. anode voltage drops from 90 % to 10 % of its initial value. both B and C. anode current rises 10 % to 90 % of its final value. gate current rises from 90 % to 100 % of it final value. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics A thyristor can termed as Square wave switch. DC switch. Both a and B. AC switch. Square wave switch. DC switch. Both a and B. AC switch. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics After peak point, the UJT operates in the ___________ region. Saturation Negative resistance None of these Cut-off Saturation Negative resistance None of these Cut-off ANSWER DOWNLOAD EXAMIANS APP
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