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