Power Electronics A UJT has ___________. Three pn junctions Two pn junctions None of these One pn junction Three pn junctions Two pn junctions None of these One pn junction ANSWER DOWNLOAD EXAMIANS APP
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 > Ig3. Vc1 = Vc2 = Vc3 any value of Ig. Vc1 > Vc2 > Vc3 when Ig1= Ig2 Vc1 > Vc2 > Vc3 when Ig1 < Ig2 < Ig3. Vc1 > Vc2 > Vc3 when Ig1 > Ig2 > Ig3. Vc1 = Vc2 = Vc3 any value of Ig. Vc1 > Vc2 > Vc3 when Ig1= Ig2 ANSWER DOWNLOAD EXAMIANS APP
Power Electronics A triac is equivalent to two SCRs ___________. None of these In inverse-parallel In parallel In series None of these In inverse-parallel In parallel In series ANSWER DOWNLOAD EXAMIANS APP
Power Electronics Why resistor is used in Snubber circuit ? To minimize the charging current. To minimize the loss . All of these. To minimize the discharging current. To minimize the charging current. To minimize the loss . All of these. To minimize the discharging current. 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. 90. 60. 70. 80. 90. 60. 70. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics Calculate the maximum voltage that can be safely blocked by the string shown in figure, if maximum allowable leakage current is 2 mA? 6 KV. 2 KV. 10 KV. 8 KV. 6 KV. 2 KV. 10 KV. 8 KV. ANSWER DOWNLOAD EXAMIANS APP
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