Power Electronics A triac is a ___________ switch Bidirectional None of these Mechanical Unidirectional Bidirectional None of these Mechanical Unidirectional ANSWER DOWNLOAD EXAMIANS APP
Power Electronics When a UJT is turned ON, the resistance between emitter terminal and lower base terminal ___________ Remains the same None of these Is decreased Is increased Remains the same None of these Is decreased Is increased ANSWER DOWNLOAD EXAMIANS APP
Power Electronics 60 thyrsistors are connected in series and parallel to form a 10 KV and 5.5 KA switch. Each thyristor is rated for 1.2 KV, 1 KA. The no. of parallel path are 6. The efficiency of the switch is 76.3 %. 83.3 %. 90.9 %. 91.6 %. 76.3 %. 83.3 %. 90.9 %. 91.6 %. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics A UJT is sometimes called ___________ diode. High resistance Single-base Low resistance Double-base High resistance Single-base Low resistance Double-base ANSWER DOWNLOAD EXAMIANS APP
Power Electronics CB used for over current protection of thyristor operates when the fault current is neither (A) nor (B). of long period. of short duration. both (A) and (B). neither (A) nor (B). of long period. of short duration. both (A) and (B). ANSWER DOWNLOAD EXAMIANS APP
Power Electronics In reverse blocking mode of a thyristor junction J3 is in forward bias and J1, J2 in reverse bias. junction J1 and J2 is in forward bias and J3 is in reverse bias. junction J1, J3 is in reverse bias and J2 is in forward bias. junction J2 is in reverse bias and J1, J3 is in forward bias. junction J3 is in forward bias and J1, J2 in reverse bias. junction J1 and J2 is in forward bias and J3 is in reverse bias. junction J1, J3 is in reverse bias and J2 is in forward bias. junction J2 is in reverse bias and J1, J3 is in forward bias. ANSWER DOWNLOAD EXAMIANS APP
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