Power Electronics During reverse recovery time charge carrier of junction J1 is swept out. charge carrier of junction J3 is swept out. charge carrier of junction J2 recombined. both B and C. charge carrier of junction J1 is swept out. charge carrier of junction J3 is swept out. charge carrier of junction J2 recombined. both B and C. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics Which of the following is disadvantage of fast recovery diodes? Doping is carried out. None of these. Recovery is only 50 µs. Recovery is only 5 µs. Doping is carried out. None of these. Recovery is only 50 µs. Recovery is only 5 µs. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics The normal way to turn on a diac is by ___________. Breakover voltage Gate voltage None of these Gate current Breakover voltage Gate voltage None of these Gate current ANSWER DOWNLOAD EXAMIANS APP
Power Electronics Thyristor can be protected from over voltages by using voltage clamping device. heat sink. snubber circuit. fuse. voltage clamping device. heat sink. snubber circuit. fuse. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics The UJT may be used as ___________. A sawtooth generator None of these A rectifier Am amplifier A sawtooth generator None of these A rectifier Am amplifier 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 5, 7. 6, 4. 4, 6. 7, 5. 5, 7. 6, 4. 4, 6. 7, 5. ANSWER DOWNLOAD EXAMIANS APP
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