ugcnetonline.in NET Electronic Science Model Question Paper : University Grants Commission

Name of the Organization : University Grants Commission
Type of the Exam : UGC National Eligibility Test NET
Subject : Electronic Science
Year : 2014
Document Type : Model Question Paper

Website : http://www.ugcnetonline.in/question_papers_june2014.php
Download Model Question Paper :
Paper – II : https://www.pdfquestion.in/uploads/13015-electronicII.pdf
Paper – III : https://www.pdfquestion.in/uploads/13015-electronicIII.pdf

UGC NET Electronic Science Model Question Paper

Download Question Paper of UGC National Eligibility Test NET Electronic Science Sample Question is now available in the official website of  University Grants Commission.

Related : University Grants Commission NET Computer Science & Applications Model Question Paper : www.pdfquestion.in/13012.html

Instruction

** This paper contains fifty (50) objective type questions of two (2) marks each.
** All questions are compulsory

Model Questions

1. The earth has a conductivity of 10–2 mho/m, Îr = 10, µr = 2, f = 10 GHz, the earth behaves like a
(A) Good conductor
(B) Moderate conductor
(C) Good dielectric
(D) Bad dielectric

2. The carrier velocity in a silicon p-i-n photodiode with 25 µm depletion layer width is 3 × 104 m/s. The maximum response time for the pin diode is given by
(A) 52 ns
(B) 2.5 ns
(C) 62 ns
(D) 5.2 ns

3. For a JFET, above the pinch-off voltage, as the drain voltage increases, the
(A) the drain current remains constant.
(B) the drain current decreases.
(C) the drain current increases linearly.
(D) the drain current varies parabolically.

4. What bandwidth is needed for an FM signal that has a peak deviation of ± 3 KHz and handles audio signals from 200 Hz to 5 KHz ?
(A) 6 KHz
(B) 16 KHz
(C) 10 KHz
(D) 9.6 KHz

5. In which of the following base system, 132 is not a valid number ?
(A) Base 16
(B) Base 10
(C) Base 8
(D) Base 2

6. Microprocessor development had happened because of LSI. What is LSI ?
(A) Large Scale Integral
(B) Large Signal Integration
(C) Large Scale Integration
(D) Long Signal Integration

7. ‘Stdio.h’ header file contains functions related to
(A) prototypes for the standard input/output library functions.
(B) prototypes for the standard input and standard output functions.
(C) prototypes for the functions that perform input from files.
(D) prototypes for functions that perform input from strings in memory and outputs to strings in memory.

8. The threshold voltage of a MOSFET can be lowered by
1. using a thinner gate oxide
2. reducing the carrier concentration in the substrate
3. increasing the carrier concentration in the substrate Of these statements :
(A) 3 alone is correct.
(B) 1 and 2 are correct
(C) 1 and 3 are correct
(D) 2 alone is correct

9. An angular position to be measured using a transducer. Which of the following types of transducers can be used for this purpose ?
1. Circular potentiometer
2. LVDT
3. E-pick off
4. Synchro
Select the correct answer using the codes given below :
Codes :
(A) 1, 2, 3 and 4
(B) 2 and 3
(C) 1, 2 and 4
(D) 1 and 4

10. In optical fibers, following statements are given :
1. 1550 nm is zero dispersion wavelength
2. 1330 nm is zero dispersion wavelength
3. At 1330 nm, attenuation is minimum
4. At 1550 nm, attenuation is minimum
Which one of the following is correct ?
(A) 1 and 4 are true.
(B) 1 and 3 are true.
(C) 2 and 4 are true.
(D) 1, 2 and 3 are true.

11. Which of the following techniques are used to generate frequency modulated signal :
1. Armstrong
2. Foster-Sealy Discriminator
3. Balanced Modulator
4. Reactance Modulator
Which one of the following is true ?
(A) 1 and 2
(B) 1, 2 and 3
(C) 1 and 3
(D) 1 and 4

12. Which of the following statements are true regarding the operation of JK flip-flop ?
1. When K input is low and J input is high, the Q output of the flip flop is reset.
2. When K input is high and J input is low, the output Q of the flip flop is set.
3. When both the inputs K and J are low, the output Q does not change.
4. When both the inputs K and J are high it is possible to set or reset the flip-flop (ie) the output toggle on next positive clock edge.
Which one of the following is true ?
(A) 1 and 2
(B) 3 and 4
(C) 1, 2 and 3
(D) All of the above

13. A linear two-terminal network can be replaced by an equivalent circuit consisting of a current source in parallel with resistor RN, where RN is the ratio of
1. Closed circuit voltage to short circuit current at the terminal pair.
2. Open circuit voltage to open circuit current at the terminal pair.
3. Open circuit voltage to short circuit current at the terminal pair.
4. Closed circuit voltage to open circuit current at the terminal pair.
(A) 1 and 4
(B) only 2
(C) 3 only
(D) only 3 and 4

14. C programming language can be considered as
1. Low level programming
2. High level programming
3. Assembly level programming
4. Machine level programming
(A) 1 and 4
(B) 2 and 3
(C) 1 and 2
(D) 3 and 4

15. A linear two terminal circuit can be replaced by an equivalent circuit consisting of a voltage source Vt in series with a resistor Rt where Rt is the ratio of
1. open circuit voltage to the short circuit current at the terminal pair.
2. short circuit current to the short circuit voltage at the terminal.
3. Open circuit voltage to the open circuit current at the terminal pair.
4. the independent sources are turned off.
(A) 1 and 4
(B) 2 and 4
(C) 3 and 4
(D) 2 and 3