Power Electronics What happen due to high di / dt? Breakdown of junction. Insulation failure. None of these. Local hot spot. Breakdown of junction. Insulation failure. None of these. Local hot spot. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics Which of the following is not a characteristic of UJT? Bilateral conduction Negative resistance Intrinsic stand off ratio Peak-point voltage Bilateral conduction Negative resistance Intrinsic stand off ratio Peak-point voltage 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 4, 6. 5, 7. 6, 4. 7, 5. 4, 6. 5, 7. 6, 4. 7, 5. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics An SCR has half cycle surge current rating of 3000 A for 50 Hz supply. One cycle surge current will be 4242.64 A. 1500 A. 2121.32 A. 6000 A. 4242.64 A. 1500 A. 2121.32 A. 6000 A. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics When a UJT is turned ON, the resistance between emitter terminal and lower base terminal ___________ Remains the same Is increased Is decreased None of these Remains the same Is increased Is decreased None of these ANSWER DOWNLOAD EXAMIANS APP
Power Electronics What may happen high dV / dt? Both A and B. Breakdown of J2 junction. Unwanted turn ON. Anyone of these. Both A and B. Breakdown of J2 junction. Unwanted turn ON. Anyone of these. ANSWER DOWNLOAD EXAMIANS APP
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