Power Electronics Let of a thyristor Vc1, Vc2, Vc3 are forward break over voltage for gate current Ig1, Ig2, Ig3 respectively. Then Vc1 > Vc2 > Vc3 when Ig1 > Ig2 > Ig3. Vc1 > Vc2 > Vc3 when Ig1= Ig2 Vc1 > Vc2 > Vc3 when Ig1 < Ig2 < Ig3. Vc1 = Vc2 = Vc3 any value of Ig. Vc1 > Vc2 > Vc3 when Ig1 > Ig2 > Ig3. Vc1 > Vc2 > Vc3 when Ig1= Ig2 Vc1 > Vc2 > Vc3 when Ig1 < Ig2 < Ig3. Vc1 = Vc2 = Vc3 any value of Ig. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics A UJT is sometimes called ___________ diode. Double-base High resistance Low resistance Single-base Double-base High resistance Low resistance Single-base ANSWER DOWNLOAD EXAMIANS APP
Power Electronics The capacitance of reversed bised junction J2 in a thyristor is CJ2 = 20 pF and can be assumed to be independant of the off state voltage. The limiting value of the charging current to turn on the thyristor is 16 mA. What is the critical value of dv/dt? 800 V/µs. 600 V/µs. 1200 V/µs. 1000 V/µs. 800 V/µs. 600 V/µs. 1200 V/µs. 1000 V/µs. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics A string of n parallel SCRs is operated at 72 KA, the rating of each SCR is 1 KA. If derating factor of the string is 0.1. Then calculate the value of n 80. 70. 90. 60. 80. 70. 90. 60. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics Delay time is defined by the interval when anode voltage drops from 100 % to 90 % of its actual value. gate current increases from 90 % to 100 % of its final value. all of these. anode current reaches 10 % from forward leakage current. anode voltage drops from 100 % to 90 % of its actual value. gate current increases from 90 % to 100 % of its final value. all of these. anode current reaches 10 % from forward leakage current. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics A diac is simply ___________. A three junction device None of these A single junction device A triac without gate terminal A three junction device None of these A single junction device A triac without gate terminal ANSWER DOWNLOAD EXAMIANS APP
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