Power Electronics When a large surge current of very short duration flows through a thyristor then which one of the following device will operate to protect the thyristor ? CB. Snubber circuit. Fast acting current limiting device (FACL fuse). Voltage clamping device. CB. Snubber circuit. Fast acting current limiting device (FACL fuse). Voltage clamping device. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics A UJT is sometimes called ___________ diode. Single-base Double-base Low resistance High resistance Single-base Double-base Low resistance High resistance ANSWER DOWNLOAD EXAMIANS APP
Power Electronics When a UJT is turned ON, the resistance between emitter terminal and lower base terminal ___________ None of these Remains the same Is increased Is decreased None of these Remains the same Is increased Is decreased 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 Vc1 = Vc2 = Vc3 any value of Ig. Vc1 > Vc2 > Vc3 when Ig1 < Ig2 < Ig3. Vc1 > Vc2 > Vc3 when Ig1 > Ig2 > Ig3. Vc1 > Vc2 > Vc3 when Ig1= Ig2 Vc1 = Vc2 = Vc3 any value of Ig. Vc1 > Vc2 > Vc3 when Ig1 < Ig2 < Ig3. Vc1 > Vc2 > Vc3 when Ig1 > Ig2 > Ig3. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics In a P1N1P2N2 thyristor which layer is less doped ? N2. P1. N1. P2. N2. P1. N1. P2. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics Dynamic equalising circuit is useful for voltage equalisation. to limit di / dt of SCR. to limit dV / dt of SCR. both B and C. for voltage equalisation. to limit di / dt of SCR. to limit dV / dt of SCR. both B and C. ANSWER DOWNLOAD EXAMIANS APP
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