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Exam Details

ISROElectronics & Communication Engineering DECEMBER 2017

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Questions 80
Duration 180 mins
Package ESE & GATE EC - Previous Year Papers

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Difficulty distribution

Medium 68 85%
Hard 8 10%
Easy 4 5%

Question type distribution

Multiple Choices 80 100%

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Sample questions from this paper

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1
2017 · Unclassified
ISROElectronics & Communication Engineering DECEMBER 2017
If the transformer and diodes in the following circuit are idea, Find out the Capacitor (Co) provides 5% ripple voltage across RL. (Assume that Sin-1(0.95) /5 in Radians ln(0.95) -0.051)
A
4.7 F
B
16.7 p F
C
8.7 p
D
2.7 pF
2
2017 · Unclassified
ISROElectronics & Communication Engineering DECEMBER 2017
Relationship between doppler frequency shifts of two radars A and B having 0.1 foot and 0.05 foot wavelengths, approaching the target at 1000 feet per second and 2000 feet per second rate respectively, will be
A
Doppler frequency shift of radar A will be one-fourth of doppler frequency shift of radar B
B
Doppler frequency shift of radar A will be double of doppler frequency shift of radar B
C
Doppler frequency shifts of radar A and radar B will be same
D
Doppler frequency shift of radar A will be one-half of doppler frequency shift of radar B
3
2017 · Unclassified
ISROElectronics & Communication Engineering DECEMBER 2017
A sinusoidal input which can be reproduced in an OP-AMP without any distortion having slew rate of 10V/s and 5V peak output amplitude, has the maximum frequency of
A
1KHz.
B
1MHz.
C
31.42MHz.
D
31.42KHz.
4
2017 · Unclassified
ISROElectronics & Communication Engineering DECEMBER 2017
Which of the following is NOT a characteristic of Schottky Diode?
A
Thermionic emission of carriers across Schottky barrier
B
Current conduction in Schottky diodes is by majority carriers
C
Switching speed of Schottky diodes is less compared to p-n junction diodes
D
Schottky diode comprises of Metal-Semiconductor junction
5
2017 · Unclassified
ISROElectronics & Communication Engineering DECEMBER 2017
The temperature below which certain materials are antiferromagnetic and above which they are paramagnetic is called
A
Weiss temperature
B
Curie temperature
C
Neel temperature
D
None of the above
6
2017 · Unclassified
ISROElectronics & Communication Engineering DECEMBER 2017
In metals, the thermal conductivity K and electrical conductivity σ are related as L is known as
A
Lattice constant
B
Lorenz number
C
Larmor number
D
Lanevin Function