Online TestThyristors Questions and Answers – Part 2 Thyristor Questions and Answers Power Electronics Objective Questions & Answers 0% A thyristor can be bought from the forward conduction mode to forward blocking mode by applying a negative gate signal the dv/dt triggering method applying a positive gate signal applying a reverse voltage across anode-cathode terminals Correct!Wrong!- Continue >> Usually the forward voltage triggering method is not used to turn-on the SCR because it increases losses it may damage the junction & destroy the device it causes noise production relatively it’s an inefficient method Correct!Wrong!- Continue >> The value of anode current required to maintain the conduction of an SCR even though the gate signal is removed is called as the peak anode current latching current holding current switching current Correct!Wrong!- Continue >> Among the following, the most suitable method to turn on the SCR device is the temperature triggering method forward voltage triggering method dv/dt triggering method gate triggering method Correct!Wrong!- Continue >> ________ are semiconductor thyristor devices which can be turned-on by light of appropriate wavelengths. LASERs LGTOs MASERs LASCRs Correct!Wrong!- Continue >> The forward break over voltage is maximum when Gate current = ∞ Gate current = 0 It is independent of gate current Gate current = -∞ Correct!Wrong!- Continue >> The forward break over voltage is the gate voltage at which conduction starts with no anode-cathode voltage gate voltage at which conduction starts with anode-cathode voltage applied anode-cathode voltage at which conduction starts with no gate signal applied anode-cathode voltage at which conduction starts with gate signal applied Correct!Wrong!- Continue >> For the SCR to remain in the ON (conducting) state gate signal is continuously required no forward anode-cathode voltage is required no continuous gate signal is required negative gate signal is continuously required Correct!Wrong!- Continue >> For a forward conducting SCR device, as the forward anode to cathode voltage is increased the forward impedance of the device goes on increasing the device turns on at higher values of gate current the forward impedance of the device goes on decreasing the device turns on at lower values of gate current Correct!Wrong!- Continue >> In the reverse blocking mode the middle junction (J2) has the characteristics of that of a inductor none of the mentioned capacitor transistor Correct!Wrong!- Continue >> Share the quiz to show your results ! Facebook Facebook Just tell us who you are to view your results ! Show my results >> Thyristors-2 I got %%score%% of %%total%% right ↺ PLAY AGAIN ! Share With Your Friends Facebook Twitter LinkedIn Pinterest Email WhatsApp
