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AE 2019 || Day 6 || Power Electronics Quiz 2

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Question 1

A single-phase AC regulator fed from 50 Hz supply to a load, having 4 Ω resistance and 12.73 mH inductance. The control range of firing angle will be

Question 2

A freewheeling diode in phase-controlled rectifiers

Question 3

Turn on time of an SCR can be reduced by using a

Question 4

In a power circuit of 3 kV, four thyristors each of rating 800 V are connected in series. What is the percentage series derating factor?

Question 5

A modern power semiconductor device that combines the characteristics of BJT and MOSFET is

Question 6

Turn-ON of a Thyristor takes place when

Question 7

A gate turn off (GTO) thyristor has capacity to

Question 8

In the ac regulator of figure-1, the supply voltage and gate currents waveforms are as in figure-2, what is the load voltage waveform for R = 0?

Question 9

In a dual converter, the circulating current

Question 10

In a three phase voltage source inverter operating in square wave mode, the output line voltage is free from
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Nov 27ESE & GATE EE