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# GATE 2021 : Power Electronics Rapid Quiz 1 (App update required to attempt this test)

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Question 1

Consider the following.
A) MOSFET
B) IGBT
C) BJT
Which of the following can block the flow of reverse voltage?

Question 2

A single phase full converter is feeding a RLE load. The voltage source is of 220V, 50Hz and load is R=5ohms, E=50V & the firing angle of SCRs is 250. The load current is constant as load inductance is very large. Find the average value of load voltage.

Question 3

A dc battery of 50 V is charged through a 10Ω resistor as shown in the figure. Assume that the thyristor is continuously fired. The average value of charging current (in A) is Question 4

For the given Δ – γ connected transformer. Diode D3 converts from Question 5

A 220V, 1500rpm, 10A separately excited DC motor has armature resistance

of 0.1 Ω. The motor is supplied from 3-Ø full wave uncontrolled rectifier to a 220V, 3-Ø 50Hz supply through Delta- star transformer. The transformer turn ratio so that the converter applies rated voltage to the motor (Assume transformer is ideal and conduction is continuous).

Question 6

For the below figure the constant current Io will be. • 494 attempts Member since Feb 2020 GradeStack Learning Pvt. Ltd.Windsor IT Park, Tower - A, 2nd Floor, Sector 125, Noida, Uttar Pradesh 201303 help@byjusexamprep.com