Power Electronics Practical way of obtaining static voltage equalization in series connected SCRs is by the use of one resistor in series with each SCR. one resistor across the string. resistors of different values across each SCR. resistors of the same value across each SCR. one resistor in series with each SCR. one resistor across the string. resistors of different values across each SCR. resistors of the same value across each SCR. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics A triac can pass a portion of ___________ half-cycle through the load. Only positive None of these Both positive and negative Only negative Only positive None of these Both positive and negative Only negative ANSWER DOWNLOAD EXAMIANS APP
Power Electronics Which of the following is disadvantage of fast recovery diodes? Recovery is only 50 µs. Doping is carried out. Recovery is only 5 µs. None of these. Recovery is only 50 µs. Doping is carried out. Recovery is only 5 µs. None of these. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics A thyristor string is made of a no. of SCR connected in series and parallel. The string have volume and current of 11 KV and 4 KA. The voltage and current rating of available SCRs are 1800 V and 1000 A. For a string efficiency of 90 % let the number of SCRs in series and parallel are a and b respectively. Then the value of a and b will be 7, 5. 4, 6. 5, 7. 6, 4. 7, 5. 4, 6. 5, 7. 6, 4. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics What may happen high dV / dt? Unwanted turn ON. Breakdown of J2 junction. Both A and B. Anyone of these. Unwanted turn ON. Breakdown of J2 junction. Both A and B. Anyone of these. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics During which time maximum conduction spreading take place in the thyristor during turn ON? Delay time. Rise time. Same for every case. Spread time. Delay time. Rise time. Same for every case. Spread time. ANSWER DOWNLOAD EXAMIANS APP
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