Power Electronics When a large surge current of very short duration flows through a thyristor then which one of the following device will operate to protect the thyristor ? Voltage clamping device. Snubber circuit. Fast acting current limiting device (FACL fuse). CB. Voltage clamping device. Snubber circuit. Fast acting current limiting device (FACL fuse). CB. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics Snubber circuit is used with SCR either series or parallel. anti parallel. in parallel. in series. either series or parallel. anti parallel. in parallel. in series. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics Between the peak point and the valley point of UJT emitter characteristics we have ___________ region Saturation Negative resistance Cut-off None of these Saturation Negative resistance Cut-off 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 4, 6. 6, 4. 7, 5. 5, 7. 4, 6. 6, 4. 7, 5. 5, 7. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics Which statement is true for latching current ? 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. It is related to conduction process of device. It is related to turn on process of the device. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics When the emitter terminal of a UJT is open, the resistance between the base terminal is generally ___________. None of these High Extremely low Low None of these High Extremely low Low ANSWER DOWNLOAD EXAMIANS APP
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