Power Electronics The triac is ___________. Not a thyristor Like a bidirectional SCR A four-terminal device None of these Not a thyristor Like a bidirectional SCR A four-terminal device None of these 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 1500 A. 6000 A. 2121.32 A. 4242.64 A. 1500 A. 6000 A. 2121.32 A. 4242.64 A. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics When the temperature increases, the intrinsic stand off ratio ___________. Essentially remains the same Decreases None of these Increases Essentially remains the same Decreases None of these Increases ANSWER DOWNLOAD EXAMIANS APP
Power Electronics A triac is equivalent to two SCRs ___________. In inverse-parallel None of these In parallel In series In inverse-parallel None of these In parallel In series ANSWER DOWNLOAD EXAMIANS APP
Power Electronics What is used to protect a thyristor from high di / dt conditions? Fuse. Snubber circuit. Voltage clamping device. Inductor. Fuse. Snubber circuit. Voltage clamping device. Inductor. 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. 4, 6. 7, 5. 6, 4. 5, 7. 4, 6. 7, 5. 6, 4. ANSWER DOWNLOAD EXAMIANS APP