Power Electronics CB used for over current protection of thyristor operates when the fault current is of short duration. of long period. both (A) and (B). neither (A) nor (B). of short duration. of long period. both (A) and (B). neither (A) nor (B). ANSWER DOWNLOAD EXAMIANS APP
Power Electronics A single phase one pulse controlled circuit has a resistance R and counter emf E load 400 sin(314 t) as the source voltage. For a load counter emf of 200 V, the range of firing angle control is 30° to 180°. 60° to 120°. 30° to 150°. 60° to 180°. 30° to 180°. 60° to 120°. 30° to 150°. 60° to 180°. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics Between the peak point and the valley point of UJT emitter characteristics we have ___________ region Cut-off None of these Negative resistance Saturation Cut-off None of these Negative resistance Saturation ANSWER DOWNLOAD EXAMIANS APP
Power Electronics An SCR has half cycle surge current rating of 3000 A for 50 Hz supply. One cycle surge current will be 4242.64 A. 6000 A. 2121.32 A. 1500 A. 4242.64 A. 6000 A. 2121.32 A. 1500 A. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics Thyristor can be protected from over voltages by using fuse. snubber circuit. voltage clamping device. heat sink. fuse. snubber circuit. voltage clamping device. heat sink. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics Materials used in heat sink should have high melting point. All of these. high thermal conductivity. large surface area. high melting point. All of these. high thermal conductivity. large surface area. ANSWER DOWNLOAD EXAMIANS APP
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