State Eligibility Test Physics Question Paper 2017 : LBS Centre for Science & Technology

Name of the Organisation : LBS Centre for Science & Technology
Exam : State Eligibility Test
Subject : Physics
Year : 2017 Feb
Document Type : Model & Past Question Papers

Website : https://lbscentre.in/
Physics 2010 : https://www.pdfquestion.in/uploads/13431-Phy2010.pdf
Physics 2011 : https://www.pdfquestion.in/uploads/13431-Phy2011.pdf
Physics 2012 : https://www.pdfquestion.in/uploads/13431-Phy2012.pdf
Physics 2013-Jun : https://www.pdfquestion.in/uploads/13431-Phy2013Jun.pdf
Physics 2013-Dec : https://www.pdfquestion.in/uploads/13431-Phy2013Dec.pdf
Physics 2015-Jun : https://www.pdfquestion.in/uploads/13431-Phy2015Jun.pdf
Physics 2015-Dec : https://www.pdfquestion.in/uploads/13431-Phy2015Dec.pdf
Physics 2016-Jun : https://www.pdfquestion.in/uploads/13431-Phy2016.pdf
Physics 2017-Feb : https://www.pdfquestion.in/uploads/13431-Phy2017.pdf

State Eligibility Test Physics Question Paper :

Time : 120 Minutes

Related : LBS Centre for Science & Technology State Eligibility Test Philosophy Question Paper 2017 : www.pdfquestion.in/13426.html

1. The ripple factor in a rectier circuit indicates the
A) amount of a.c voltage present in the output.
B) amount of d.c voltage present in the output.
C) change in d.c output when load changes.
D) change in d.c voltage when in put a.c voltage changes.

2. The JFET is
A) a bipolar device.
B) a current controlled device.
C) a form of op-amp.
D) a unipolar device.

3. The purpose of oset nulling in an op-amp is to
A) reduce the gain.
B) zero the output error voltage.
C) equalize the output signal.
D) increase the gain.

4. Solar cell work on the principle of
A) electron hole generation in a semiconductor by temperature rise.
B) photo electric eect.
C) electron hole generation in a pn junction by incident photons.
D) thermionic emission.

5. For an oscillator the product Av and attenuation of the feed back of the circuit must be
A) equal to 1.
B) less than one.
C) 10.
D) 100.

6. For operation as an amplier the base of a npn transistor has to be
A) negative with respect to the emitter.
B) zero bias.
C) positive with respect to collector.
D) positive with respect to the emitter.

7. Which of the following gates are known as universal gates?
A) AND and OR.
B) AND and NOT.
C) NAND and NOR.
D) OR and XOR.

8. Most commonly used material for optical ber is
A) silica.
B) silicon.
C) alumina.
D) germanium.

9. Sky wave propagation make use of
A) direct propagation of radio waves between antennas in the line of sight.
B) reection of radio waves by ionized layers in the upper atmosphere.
C) radio waves that reect by earth surface.
D) waves transmitted with help of satellites.

10. The process of converting the digital signal to analog is achieved by designing
A) a resistive divider or ladder circuit
B) a comparator circuit
C) a circuit using gates
D) a circuit using MOSFET

11. The number of independent components of a symmetric second rank tensor in 4 -dimensions is
A) 16
B) 12
C) 10
D) 8

12. The derivative of a function f(z) of a complex variable z governs
A) the local behaviour of f(z)
B) the distant behaviour of f(z)
C) not only the local behaviour but also the distant behaviour of f(z)
D) neither the local nor the distant behaviour of f(z1)

13. Sixty tickets are marked 1, 2, 3, ……., 60. From these, five tickets are picked at random and are given one each to five persons A, B, C, D and E. What is the probability that A gets the ticket with the largest number (among A, B, C, D and E) and B gets the ticket with the smallest number (among A, B, C, D and E)?
A) 1/5
B) 1/20
C) 1/60
D) 1/9

14. The acceleration-time graph of a particle starting from rest at time t = 0 and moving along a straight line is shown in the diagram. The displacement of the particle from t = 0 to t = 3s is
A) – 20 m
B) -35 m
C) – 40 m
D) + 35 m

15. Forces 10 N, 20 N and F act along the sides of an equilateral triangle PQR of side 5 cm as shown in the figure. C is the centroid of the triangle. What is the value of F in order that the net torque about C is zero?
A) 15 N
B) 30 N
C) 10 N
D) 60 N