Power Electronics Which of following devices has highest di/dt and dv/dt capability? SCR. SIT. GTO. SITH. SCR. SIT. GTO. 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 7, 5. 5, 7. 6, 4. 4, 6. 7, 5. 5, 7. 6, 4. 4, 6. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics Between the peak point and the valley point of UJT emitter characteristics we have ___________ region None of these Saturation Cut-off Negative resistance None of these Saturation Cut-off Negative resistance ANSWER DOWNLOAD EXAMIANS APP
Power Electronics SCRs are used in series to meet low voltage demand. high voltage demand. high current demand. low current demand. low voltage demand. high voltage demand. high current demand. low current demand. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics Spread time is defined as the interval during which anode current rises from 90 % to its final value. anode voltage drops from 10 % of its initial value to zero. anode current rises from 10 % to 90 % of its final value. both (A) and (B). anode current rises from 90 % to its final value. anode voltage drops from 10 % of its initial value to zero. anode current rises from 10 % to 90 % of its final value. both (A) and (B). ANSWER DOWNLOAD EXAMIANS APP
Power Electronics Dynamic equalising circuit is useful for voltage equalisation. to limit di / dt of SCR. both B and C. to limit dV / dt of SCR. for voltage equalisation. to limit di / dt of SCR. both B and C. to limit dV / dt of SCR. ANSWER DOWNLOAD EXAMIANS APP