Power Electronics What happen due to high di / dt? None of these. Local hot spot. Breakdown of junction. Insulation failure. None of these. Local hot spot. Breakdown of junction. Insulation failure. 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 6000 A. 4242.64 A. 2121.32 A. 1500 A. 6000 A. 4242.64 A. 2121.32 A. 1500 A. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics The turn-on time of an SCR with inductive load is 20 µs. The puls train frequency is 2.5 KHz with a mark/space ratio of 1/10, then SCR will Turn on if pulse frequency us increased to two times. Turn on. Not turn on. Turn on if inductance is removed. Turn on if pulse frequency us increased to two times. Turn on. Not turn on. Turn on if inductance is removed. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics The UJT may be used as ___________. Am amplifier None of these A rectifier A sawtooth generator Am amplifier None of these A rectifier A sawtooth generator ANSWER DOWNLOAD EXAMIANS APP
Power Electronics Which statement is true for latching current ? It is related to turn off process of the device. It is related to turn on process of the device. Both C and D. It is related to conduction process of device. It is related to turn off process of the device. It is related to turn on process of the device. Both C and D. It is related to conduction process of device. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics Latching current for an SCR inserted between a dc voltage source of 200 V and load is 100 mA. Compute the minimum rate of width pulse required to turn ON the SCR in case load consists of R = 20 Ω in series with L = 0.2 H. 100 µs. 300 µs. 200 µs. 150 µs. 100 µs. 300 µs. 200 µs. 150 µs. ANSWER DOWNLOAD EXAMIANS APP
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