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5th October 2014, 04:51 PM
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Join Date: Apr 2013
Re: Question paper of PGECET for ECE

PGECET is the Post Graduate Engineering common Entrance Test. It is conducted by University College of Engineering, Osmania University

Eligibility Criteria:
Graduation in Engineering

PGECET Exam Pattern:
The Question Paper for PGECET will be in English
The questions will be multiple choice and objective
Total number of questions: 120
Each question carrying 1 marks and there is no negative marking for wrong answer
Duration: 2 hours

PGECET 2014 Previous Papers


Electronices Sample Questions :
Q-8 A circuit has a resistance of 11 W, a coil of inductive reactance 120 W, and a
capacitor with a 120-W reactance, all connected in series with a 110-V, 60-Hz power
source. What is the potential difference across each circuit element?
A) (a) VR = 110 V, (b) VL = VC = 1.2 Kv
B) (a) VR = 120 V, (b) VL = VC = 2.4 kV
C) (a) VR = 4.8 V, (b) VL = VC = 0 kV
D) (a) VR = 5.0 V, (b) VL = VC = 8.0 V

Q-2 Applying DeMorgan's theorem to the expression , we get
A) (A+B)+C
B) A(B + C)
C) Both A & B
D) None of above

Q-4 Refer Below figure to Determine the resonant frequency…
A) 123.4 kHz
B) 61.7 kHz
C) 45.97 kHz
D) 23.1 kHz

Q-4 Express the decimal number 57 in binary.
A) 100101
B) 111010
C) 110010
D) 111001

Q-5 A vertical electric dipole antenna
a) radiates uniformly in all directions.
b) radiates uniformly in all horizontal directions, but more strongly in the vertical
direction.
c) radiates most strongly and uniformly in the horizontal directions
d) does not radiate in the horizontal directions


Q-6 A particle oscillates according to the equation y=5.0 cos 23 t, where y is in
centimeters. Find its frequency of oscillation and its position at t=0.15 s.
a) f = 23 Hz, y = -4.8 cm
B) f = 3.7 Hz, y = -5.0 cm
C) f = 3.7 Hz, y = -4.8 cm
D) f = 3.7 Hz, y = +4.8 cm

Q-7 A 10.0-µF capacitor is in series with a 40.0-W resistance, and the combination is
connected to a 110-V, 60.0-Hz line. Calculate (a) the capacitive reactance, (b) the
impedance of the circuit, (c) the current in the circuit, (d) the phase angle between current
and supply voltage
A) (a) 0.0038W (b) 305W (c) 0.415 A (d) voltage lags by 8.58°
B) (a) 266W (b) 269W (c) 0.409 A (d) voltage lags by 81.4°
C) (a) 16 kW (b) 72 kW (c) 2.75 A (d) voltage lags by 6.63°
D) (a) 2.6 kW (b) 262W (c) 0.256 MA (d) voltage leads by 81.4°

Q-8 A circuit has a resistance of 11 W, a coil of inductive reactance 120 W, and a
capacitor with a 120-W reactance, all connected in series with a 110-V, 60-Hz power
source. What is the potential difference across each circuit element?
A) (a) VR = 110 V, (b) VL = VC = 1.2 Kv
B) (a) VR = 120 V, (b) VL = VC = 2.4 kV
C) (a) VR = 4.8 V, (b) VL = VC = 0 kV
D) (a) VR = 5.0 V, (b) VL = VC = 8.0 V

Q-9 What is the primary function of multiplexing?
A ) To match the frequency range of a signal to a particular channel.
B ) To reduce the bandwidth of a signal.
C ) To select one radio channel from a wide range of transmitted channels. D ) To allow a number of signals to make use of a single communications channel.

Q-10 A second step to further increase system capacity is a digital access method called
TDMA (Time Division Multiple Access). Using the same frequency channelization and
reuse as FDMA analog but adding a time sharing element, the effective capacity is:
A) Doubled
B) Tripled
C) Reduced by one third
D) Unchanged

Q-11 What are Pseudo-Random noise sequences, or P/N Sequences?
A) P/N Sequences are known sequences which exhibit the properties or chracteristics of


random sequences
B) P/N Sequences can be used to logically isolate users on the same physical (frequency)
channel
C) P/N Sequences appear as random noise to everyone else, except to the transmitter and
intended receiver
D) All of the above

Q-12 An op-amp integrator has a square-wave input. The output should be
A ) a sine wave.
B) a triangle wave
C) a square wave.
D) pure DC.

Q-13 What is the relationship between the series and parallel resonant frequencies of a
quartz crystal?
A) They are equal.
B) Parallel resonant frequency is approximately 1 kHz higher than series resonant
frequency
C) Series resonant frequency is approximately 1 kHz higher than parallel resonant
frequency.
D) none of the above

Q-14 Refer Below figure to Determine the resonant frequency…
A) 123.4 kHz
B) 61.7 kHz
C) 45.97 kHz
D) 23.1 kHz

Q-15 Which FET amplifier(s) has (have) a phase inversion between input and output
signals?
A) common-gate
B) common-drain
C) common-source
D) all of the above


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