Kerala PSC Previous Years Question Paper & Answer
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Below are the scanned copy of Kerala Public Service Commission (KPSC) Question Paper with answer keys of Exam Name 'Assistant Professor in Electrical and Electronics Engineering' And exam conducted in the year 2023. And Question paper code was '080/2023'. Medium of question paper was in Malayalam or English . Booklet Alphacode was 'A'. Answer keys are given at the bottom, but we suggest you to try answering the questions yourself and compare the key along wih to check your performance. Because we would like you to do and practice by yourself.
86. A single phase full-bridge inverter using SCRs and Diodes is feeding a resistance 5Q from an
input 60V DC
@ RMS value of output voltage is 60V
Gi) Output power will be 720 W.
(^) Only (i is correct ൯) Only Gi) is correct
(C) Both are correct (D) Both are not correct
87. Which of the following statements is correct?
(^) In sinusoidal pulse width modulation, the carrier wave frequency is less than
reference wave frequency
൯) The ratio of reference wave voltage to carrier wave voltage is called modulation
index
(C) In sinusoidal pulse width modulation, the carrier wave frequency is equal to
reference wave frequency
(D) All the above statements are not correct
88. Find the fundamental component of RMS output voltage for the following circuit :
(A) 7٢ ൫ 225 ए
© प (D) 50%
89. The percentage content ೦8 7% harmonic with respect of fundamental output in single phase
inverter is :
(A) 14.28% (B) 18.18%
(C) 25.46% (0) 33.38 %
080/2028 20 A