Kerala PSC Previous Years Question Paper & Answer
Page:15
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.
73. The given oscillator circuit shown in figure is :
2pF
(ಹ) Colpitts oscillator with @,scination = 500 MHz
(B) Hartley oscillator with @,scittation = 500 MHz
(0) Colpitts oscillator with @,.cination = 1000 MHz
(D) Hartley oscillator with Q,cittation = 1000 MHz
74. An op-amp gives triangular wave output as shown in figure for square wave input of 1 MHz
and 8 V amplitude. What is the slew rate of op-amp?
Vo
2
t
-2V JAAS
0.8us
(A) 20 Vius ®) 10VW/ us
(0) 16 V/us () 8V/us
75. Consider the following statements with respect to op-amp and VCO:
@ The input offset voltage in op-amp is due to mismatch in transistor parameters
(ii) Op-amp is a voltage controlled current source
(iii) The output frequency of VCO depends on timing resistor and inductor only
(iv) The voltage to frequency conversion factor of VCO is given by 4fo/Vec
Which of the above statements are not correct?
(A) Only (i), (ii) and (iii) (B) Only (ii), (iii) and (iv)
(C) Only Qi), Gii) and (iv) (D) All the above
A 17 080/2023
[P.T.0.]