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. 150 µs. 300 µs. 200 µs. 100 µs. 150 µs. 300 µs. 200 µs. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics Between the peak point and the valley point of UJT emitter characteristics we have ___________ region Cut-off Negative resistance Saturation None of these Cut-off Negative resistance Saturation None of these ANSWER DOWNLOAD EXAMIANS APP
Power Electronics The typical value of SCR for modern alternator is 1.5. 1.0. 0.5. 1.2. 1.5. 1.0. 0.5. 1.2. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics For series connected SCR’s dynamic equalising circuit consists of series R and diode with C across R. series R and diode with C across R. R and C in series but with diode across R. R and C in series but with diode across C. series R and diode with C across R. series R and diode with C across R. R and C in series but with diode across R. R and C in series but with diode across C. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics Which of following devices has highest di/dt and dv/dt capability? GTO. SIT. SCR. SITH. GTO. SIT. SCR. SITH. 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 6, 4. 5, 7. 4, 6. 7, 5. 6, 4. 5, 7. 4, 6. 7, 5. ANSWER DOWNLOAD EXAMIANS APP
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