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 Electronics and Communication Engineering' And exam conducted in the year 2023. And Question paper code was '051/2023'. 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.
051/23
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The propagation of electromagnetic wave is in (—Z) direction, if electric field component
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direction.
A) Y&X B) X&Y C) Y&Y D) X&X
An inductance of 0.1 nH at 10 GHz represents a reactance of
A) 6.28 ohms B) 6.00 ohms C) 0.6 ohms D) 0.66 ohms
A capacitance of 0.1 pF at 10 GHz has a reactance of
A) 129 ohms B) 139 ohms C) 149 ohms D) 159 ohms
In a transmission line, is the attenuation due the conductor loss for the
given R, and R, and Zc.
4) १1 + 72/220 2) 61 + १2/20 ©) १1/26 0) ०2/2९
Bethe-hole coupler consists of rectangular waveguides.
A) 4 B) 8
0) 2 D) None of the above
What is the coherence bandwidth when a radio channel is characterized by 4
millisecond multipath spread ?
A) 200 Hz B) 500 Hz C) 250 Hz D) 250 KHz
For the given coherence time of 100 sec, the Doppler Spread is equal to
A) 0.01 Hz B) 0.001 Hz
C) 0.1 Hz D) None of the above
IEEE 802.11 wireless technology employ multiple access scheme to
avoid collision.
A) RTS/CTS B) Polling C) CSMA/CD D) CSMA/CA
In WLAN, the channel bandwidth is divided into sub channels with subcarrier
frequency spacing of 312.5 KHz.
A) 48 B) 52 C) 46 D) 54
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