Power Electronics When the emitter terminal of a UJT is open, the resistance between the base terminal is generally ___________. Low High Extremely low None of these Low High Extremely low None of these ANSWER DOWNLOAD EXAMIANS APP
Power Electronics Which statement is true for latching current ? It is related to conduction process of device. It is related to turn on process of the device. It is related to turn off process of the device. Both C and D. It is related to conduction process of device. It is related to turn on process of the device. It is related to turn off process of the device. Both C and D. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics What happen due to high di / dt? Local hot spot. None of these. Insulation failure. Breakdown of junction. Local hot spot. None of these. Insulation failure. Breakdown of junction. 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 Gate circuit or triggering circuit of a thyristor is lower power circuit. may be low power or high power circuit. high power circuit. magnetic circuit. lower power circuit. may be low power or high power circuit. high power circuit. magnetic circuit. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics Typical range of thyristor turn OFF time is 3 - 50 µs. 3 - 10 µs. 3 - 500 µs. 3 - 100 µs. 3 - 50 µs. 3 - 10 µs. 3 - 500 µs. 3 - 100 µs. ANSWER DOWNLOAD EXAMIANS APP
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