PHYSICS GUESS PAPER (IISEM.)2018SECTION (A)

Q.1(a). What are the applications of Michelson Interferometer? (2)

(b). Write the difference between interference and diffraction (2)

(c). What do you mean by polarization? State Malus Law. (2)

(d). What are conduction band, valence band and forbidden gap? (2)

(e). What is physical significance of wave function? Write with boundary condition(2)

(f). What is Q factor & spectral purity? (2)

(g). Write short note on:- (2)

Optical pumping Metastable state Population inversion

(h) Differentiate between holography and photography. (2)

SECTION( B)

Q.2(a). Explain the construction and working of Michelson’s interferometer. Obtain the expression for radii of circular interference fringes how shall you use it to determine the wavelength of monochromatic light. (8)

(b). Write short note on anti–reflection coating and interference filters. (4)

(c). Find the reflectivity of a glass surface of refractive index 1.6 when a light beam is incident normally on it. (4)

Q3.(a) Show that the intensity of light diffracted from a plane transmission grating is

given by where symbols have there usual meanings. (8)𝐼 = 𝐼0(𝑆𝑖𝑛 ∝∝ )2(𝑆𝑖𝑛𝑁𝛽

𝑆𝑖𝑛𝛽 )2

(b) Show that plane polarized and circularly polarized light are the special cases of elliptically polarized light. (4)

(c). 80 gm of impure sugar when dissolved in a litre of water, gives an optical rotation of 9.90, when place in a tube of length 200mm. If the specific rotation of sugar is 66 degree (dm)-1, find the percentage purity of sugar sample. (4)

Q.4(a). Derive the expression for the coherence length & coherence time of a wave in terms of the frequency and wavelength. (6)

(b). What is an optical fiber? What do you mean by numerical aperture of an optical fiber? Find an expression for the numerical aperture and acceptance angle of a step index optical fiber. (6)

(C). Calculate the refractive indices of the core and cladding materials of a fibre from the following data. NA=0.22 and =0.012. (4)∆

Q.5(a) Explain energy band theory of crystals. On its basis bring out the difference

between insulators, semi-conductors and insulators. (6)

(b). What is Compton scattering? Obtain an expression for shift in wavelength of scattered photon by Compton scattering. (6)

(c). The wave function of a particle in its ground state in one dimensional box of

length L is given by sin . Calculate probability of finding the particle Ψ =2𝐿 (𝑛𝜋

𝐿 )𝑥

with in an interval of 1 at the centre of box of length L = 10 . (4) Å Å

Q.6 (a) In He-Ne laser, what is the function of He atoms? Explain the answer with the help of energy level diagram for He-Ne. Describe with a neat sketch the working of He-Ne laser. (6)

(b) Explain the construction of hologram and reconstruction of image by hologram using suitable diagrams. Also mention the basic requirement of holography. (6)

(c) Obtain a relation for Einstein coefficient A and B for spontaneous and stimulated emission. (4)

Q.7.(a) What is wave function ? Derive Schrödinger time dependent and independent wave equation. (8)

(b) Distinguish between Fresnel’s and Fraunhofer classes of diffraction. Show that the relative intensities of successive maxima of Fraunhofer diffraction at single slit are nearly.

(5)𝐼0:4𝐼0

9𝜋2:4𝐼0

25𝜋2:…

(c) Show that visibility is a measure of coherence. (3)

PREPARED BY

Vinod kumar

ARYA COLLEGE OF ENGINEERING AND RESEARCH CENTRE, JAIPUR

Time : 3 Hours Maximum Marks : 80 Min. Passing Marks : 28 Instructions for candidates:Attempt any five questions, including question No.1which is compulsory. All questions carry equal marks. Schematic diagrams must be shown wherever necessary. Any data you feel missing suitably be assumed and stated clearly. Units of quantities used/ calculated must be stated clearly.

Q.1 Compulsory, answer for each sub question given in above 25 words. (8x2 =16) (a) Explain Law of transmissibility of forces.

(b) What is the difference between the centre of gravity and centroid? Explain.

(c) Explain parallel and perpendicular axes theorem.

(d) Explain principle of virtual work.

(e) Describe Angle of friction and Angle of repose.

(f) Explain D’Alembert’s principle.

(g)What is law of conservation of energy?

(h) What are conservative and non conservative forces?

Q.2 (a) State and prove Lami’s theorem. A light string ABCDE whose extremity A is fixed, has Weights W1 and W2 attached to it at B and C. It passes round a small smooth peg at D carrying a weight of 300 N at the free end E as shown in Fig. (8)

Roll No. Total No. of Pages :3

B .Tech . I Year II Semester (Main/Back) Examinations -2018

OE-101 Engineering Mechanics(Sample Paper)

Made By:- PULKIT MATHUR & RAJA KUMAR

A.C.E.R.C. (MECHANICAL ENGG.)

OE-101

(b) By using principle of virtual work determine the reactions at the hinge C and at support B, when a load of 600N is acting at point E. (8)

Q.3 (a) Find centroid and then moment of inertia about the centroidal axis Ixx and Iyy of the given section. (10)

(b) The ladder as shown in figure 6m long and is supported by a horizontal floor and Vertical wall. The coefficient of friction between the floor and the ladder is 0.25 and between wall and ladder is 0.4. The weight of the ladder is 200N and act at about CG. The ladder also supports a vertical load of 900N at C which is at a distance of 1m from B. Determine the least value of α at which the ladder may be placed without slipping.

(6)

Q.4. (a) Define projectile motion and derive the following terms related to projectile motion: (i) Range (ii) Height and (iii) Time of flight (8)

(b) A stone is allowed to fall from the top of the tower 100 meters in height and at the same time another stone thrown vertically upwards with a velocity of 25 m/s. Find where and when they will meet? (8)

Q.5 (a) Explain and prove the principle of work and energy. (6) (b) Find the acceleration and tension in the string shown in figure. Coefficient of friction is 0.2 for all planes of contact. Pulley is smooth. Also determine the velocity of system in 5 sec. after starting from rest. (10)

Q.6 (a) A train is moving along a track whose gradient is 1 in 100. The weight of the train is 6000 KN. To avoid an accident, the train is brought to rest applying breaks in 250 m length along the track. The resistance due to friction and air motion is 15 N per KN weight of the train. Find the work done in bringing the train to rest. (8)

(b) A block of weight 12 N falls at a distance of 0.75 m on top of the spring. Determine the spring constant if it is compressed by 150 mm to bring the weight momentarily to rest. (8)

Q.7 (a) Write short notes on the following: (i) Principle of linear impulse and momentum (ii) Principle of angular momentum (8)

(b) A steel ball of 0.5 N falls from a height of 8 m and rebounds to a height of 6 m. Find the impulse and the average force between the ball and the floor , if the contact between the ball and the floor lasts for (1/10)th of a second. (8)

HUMAN VALUES GUESS PAPER (IISEM.)2018Ques 1.

a. W hat do you mean by your ‘Natural Acceptance’? Illustrate with example.

b. What is the need for value education in technical and other professional institutions?

c. ‘I’ is a conscious unit while the body is a material unit. Examine this statement.

d. What is ‘trust’? Difference between intention and competence.

e. What are four orders of nature?

f. “Existence = Nature submerged in space”. Elaborate this point.

g. what is ethical human conduct?

h. what is comprehensive human goal?

Ques 2. Explain the process of self-exploration with help of a diagram.

Ques 3. What is the basic requirement to fulfill human aspiration? Indicate their correct priority.

Ques 4. How does realization and understanding leads to definitiveness of human conduct?

Ques 5. What is ‘Justice’? What are its elements? Is it a continuous or a temporary need?

Ques 6. Critically examine the state of the society today in context with fulfillment of comprehensive human goal.

Ques 7. What is a holistic technology? Take any two such examples (case studies) from the Indian tradition and elaborate on them.

lud

ROLL No. ………………ARYA GROUP OF COLLEGES

GUESS PAPER 2017- 18CS 103 COMPUTER PROGRAMMING-II

Branch: Common to all

Q.1 Compulsory, Answer for each sub-question be given in about 25 words- [8x2=16]

(a) Contrast the differences between system software, application software and firmware.

(b) Explain the difference between structure and union with example.

(c) Explain typedef declaration.

(d) Elaborate the differences between inline functions and macro.

(e) Write a program to demonstrate ssprintf() and sscanf().

(f) What are translators? Explain compiler, assembler and interpreter briefly.

(g) Explain and differentiate between freeware, open source and shareware software

(h) Explain loader and its purpose.

Q.2 (a) What are computer peripherals? Explain with examples. [6]

(b) What are arrays? Explain its types with syntax. Write a program to arrange elements of integer array into ascending order. [10]

Q.3 (a) What is a character array? Elaborate on at least five string handling function with example.

[8]

(b) Explain pointers. How are they related to arrays? Explain with a program [8]

Q.4 (a) Explain dynamic memory allocation and all its handling functions with a program to input and print an n-sized integer array.

[8]

(b) Explain preprocessor and its directives elaborating on file inclusion, conditional compilation and macro substitution.

[8]

Q.5 (a) Write a short note on command line arguments and explain with an example. [6]

(b) Write a program to elaborate with syntax array of structures. [10]

Q.6 (a) Explain the concept of files and modes associated with fopen(). Elaborate on file handling functions in detail with syntax.

[16]

Q.7 (a)

(b)

List and explain with any five functions from graphics library.

Write a program to draw a hut shaped figure in C.

CY-101 ENGINEERING CHEMISTRY(GUESS PAPER)

SECOND SEMISTER

Q.1 Short answer type questions-

(a) Degree of hardness

(b) What is mean by knocking and octane number of petrol.

(c) What is carbonization process?

(d) Explain Pilling Bed worth Rule.

(e) Setting and hardening of cement.

(f) Caustic embrittlement (g) Steam emulsion number.

(h) Vulcanization process of rubber.

Q.2 (a) Determine the hardness of water by EDTA method. Give the chemical reactions involved during process.

(b) Write short note on chemical methods for disinfection of water.

Q.3 (a) Describe Fischer Tropsch method of preparing synthetic petrol.

(b) How calorific value of a coal sample is determined by Bomb calorimeter.

Q.4 (a) Give the preparation, properties and uses of following-

1) Bakelite

2) Nylons

(b) How is the viscosity determined by Red-wood Viscometer?

Q.5 (a) Write the short note on following-

1. Pitting corrosion

2. Concentration cell corrosion

(b) Write short notes on metallic coatings foe corrosion protection.

Q.6 (a) Define glass and its properties .Explain the manufacture of coloured glass with chemical reactions.

(b) A standard hard water contains 1.0 g of CaCO3 per lit . 50 ml of this required 45 ml of EDTA solution, while 50 ml of hard water Sample required 18 ml EDTA solution and 50 ml boiled water sample required 9 ml EDTA solution calculate the total, permanent and temporary hardness of the given sample of water in term of ppm .

Q.7 Write short notes on the followings-

a) Seger cone test method and RUL test method

b) Optical grade glass

c) A gaseous fuel have the following composition by volume-

H2= 20%, CH4= 5%, CO=20%, CO2=5%, N2=50% .If 50% excess of air is used find the wt. of air actually supplied per m3 of this fuel.

lud

ROLL No. ………………ARYA GROUP OF COLLEGES

GUESS PAPER FOR RTU EXAMINATION 2017- 18MA 101ENGINEERING MATHEMATICS -II

Branch: Common to allMax Marks: 80 Time: 3 hrs.Min Passing Marks: 16Note: Section A: Compulsory for All. Section B: Attempt any three questions out of Five Questions.

SECTION: A (Compulsory)Q. 1 Write in Short Answers (2*4)

(a)

(b)

(c)

(d)

(e)

(f)

Define Rank of a Matrix and find the rank of the matrix

𝐴 = [1 2 32 3 43 4 5]

Define linear differential equation of first and solve.

𝑥𝑙𝑜𝑔𝑥𝑑𝑦𝑑𝑥 + 𝑦 = 2𝑙𝑜𝑔𝑥

Solve .(3𝑥2 +𝑦𝑥)𝑑𝑥 + (𝑥3 + 𝑙𝑜𝑔𝑥)𝑑𝑦 = 0

Formulate Partial differential equation by eliminating arbitrary constant.(𝑥 ‒ 𝑎)2 + (𝑦 ‒ 𝑏)2 + 𝑧2 = 1.

Solve .𝑝 + 3𝑞 = 5𝑧 + tan (𝑦 ‒ 3𝑥)Are the following vectors linearly dependent? If so , express these as a linear combination form 𝑋1 = (1,3,4,2,),𝑋2 = (3, ‒ 5,2,2),𝑋3 =(2, ‒ 1,3,2)

SECTION: B (Attempt any Three Questions)Q. 2 (a)

Determine Rank of the Matrix by reduce it into normal form

𝐵 = [1 2 32 4 33 2 16 8 7

0235]

(5)

(b) Test for consistency and inconsistency of the system of equations. If it’s consistent then solve them. 𝑥 + 𝑦 + 𝑧 = 6; 2𝑥 + 𝑦 + 3𝑧 = 13; 5𝑥 + 2𝑦 + 𝑧 = 12; 2𝑥 ‒ 3𝑦 ‒ 2𝑧 =‒ 10

(5)

Q. 3 (a) Find the Eigen values and Eigen vectors of the Matrix .

𝐴 = [ 8 ‒ 6 2‒ 6 7 ‒ 42 ‒ 4 3 ] (5)

(b) Verify Cayley- Hamilton theorem and find inverse of the matrix.

𝐴 = [ 2 ‒ 1 1‒ 1 2 ‒ 11 ‒ 1 2 ] (5)

Q. 4 (a) Find the Fourier series of the function and deduce 𝑓(𝑥) = 𝑥2 ; ‒ 𝜋 < 𝑥 < 𝜋

the following results (i) 𝜋2

12 = 1 ‒1

22 +1

32 ‒ …

ii)( 𝜋2

6 = 1 +1

22 +1

32 + …

(5)

(b) Find the half range sine series for the function 𝑓(𝑥)= 𝑥 𝑖𝑛 𝑡ℎ𝑒 𝑖𝑛𝑡𝑒𝑟𝑣𝑎𝑙 0 < 𝑥 < 2 (5)

Q. 5 (a)

Obtain the first three cosine terms and the constant terms in the Fourier series of y where.x 0 1 2 3 4 5y 4 8 15 7 6 2

(5)

(b) Find the Fourier series to represent 𝑓(𝑥) = 𝑥𝑐𝑜𝑠 𝑥, 𝑓𝑜𝑟 ‒ 𝜋 < 𝑥 < 𝜋. (5)

Q. 6 (a)

(b)

Solve . 𝑑𝑦𝑑𝑥 +

𝑦𝑥 = 𝑦2𝑠𝑖𝑛𝑥

Solve .(1 + 𝑒𝑥𝑦)𝑑𝑥 + 𝑒𝑥/𝑦 (1 ‒

𝑥𝑦)𝑑𝑦 = 0

(5)

(5)

Q.7 (a) Solve . (5)(𝐷3 + 2𝐷2 + 𝐷)𝑦 = 𝑒 ‒ 𝑥 + 𝑐𝑜𝑠𝑥 + 𝑥2

(b) Solve . (5)𝑑2𝑦

𝑑𝑥2 + 𝑎2𝑦 = 𝑠𝑒𝑐𝑎𝑥

Q.8 (a) Solve . (5) (1 + 𝑥)2𝑑2𝑦

𝑑𝑥2 + (1 + 𝑥)𝑑𝑦

𝑑𝑥 + 𝑦 = 4𝑐𝑜𝑠𝑥 𝑙𝑜𝑔(1 + 𝑥)

(b) Solve . (5) 𝑠𝑖𝑛2𝑥𝑑2𝑦

𝑑𝑥2 = 2𝑦

Q.9 (a) Solve . (5)

𝑑𝑥𝑑𝑡 + 𝑦 = 𝑒𝑡𝑎𝑛𝑑

𝑑𝑦𝑑𝑡 ‒ 𝑥 = 𝑒 ‒ 𝑡

(b) Solve (5) 𝑑2𝑦

𝑑𝑥2 ‒ 𝑐𝑜𝑡𝑥𝑑𝑦𝑑𝑥 ‒ (1 ‒ 𝑐𝑜𝑡𝑥)𝑦 = 𝑒𝑥𝑠𝑖𝑛𝑥

Q.10 (a) Solve . (5) 𝑐𝑜𝑠𝑥

𝑑2𝑦

𝑑𝑥2 + 𝑠𝑖𝑛𝑥𝑑𝑦𝑑𝑥 ‒ 2𝑦𝑐𝑜𝑠3𝑥 = 2𝑐𝑜𝑠5𝑥

(b) Solve by me

lud

ROLL No. ………………ARYA GROUP OF COLLEGES

GUESS PAPER 2017- 18BASIC ELECTRICAL & ELECTRONICS ENGINEERING

Branch: Common to all

Q.1 Compulsory, Answer for each sub-question be given in about 25 words- [8x2=16]

(a) Explain Faraday’s first and second Law of electromagnetic induction.

(b) Define the Terms: (i) Armature Core & winding (ii) Commutator

(c) Define the terms: (i) R.M.S. value (Effective Value) (ii) Form Factor

(d) Define Regulation & Efficiency of Transformer.

(e) Why Rating of transformer defined in KVA?

(f) What properties of semiconductor are determined from Hall Effect Experiment?

(g) What is an Ex-NOR gate ?Write its truth table

(h) Define and Explain the following terms: Mobility (ii) Conductivity.

Q.2 (a)

(b)

Determine the current iL through 4 ohm resistor using node analysis.

Compute the power dissipiated in 9Ω resistor by applying superposition theorem.

[16]

Q.3 (a) A series RLC circuit consisting of a resistance of 40ohms, Inductance of 0.4 H and capacitance of 75uF is connected across a 230V, 50Hz source. Find (a) Impedance (b) The current (c) The magnitude and nature of power factor(d) the frequency of supply to be adjusted to make power factor unity.

[8]

(b)Find the average & RMS value for half rectified current wave as shown below.

[8]

Q.4 (a) Explain the construction and working principle of a PMMC instruments with a neat sketch. Also derive an expression for defective torque.

[16]

(b) What do you understand for Extension of Range of Instruments , explain the methods used for extend the range of instrument.

Q.5 (a) A 6-pole generator runs at 850 rpm and each pole has a flux of 24 mWb if there are 156 conductors in series between each pair of brushes. What is the value of generated emf?

[16]

(b) How many types of rotor used in Induction Motor. Explain the working principle of Induction Motor, with its applications?

Q.6 (a)(b)

What is Transformer? Drive the E.M.F. equation of Transformer.

Why testing of transformers are required? Explain the open circuit and short circuit test of Transformer.

[16]

Q.7 (a)

(b)

What is PN diode? Explain V-I characteristics of a PN diode. How it differs from Zener diode.

Simplify the following Boolean expressions:(i) F= (AB’C’)+(A’BC)’

(ii) Y= [(A+B+C)’.(AB’+C’)’’

[16]

CE- 103 BASIC CIVIL ENGINEERING

(GUESS PAPER)

UNIT- 1

1. Explain the principles of surveying in detail.2. What is the role of Civil Engineers in Society? How can you correlate the infrastructural

development with the economy of that country?

3. Explain various objects of Surveying.

UNIT- 2

1. Explain the scope of civil engineering

2. What is scale? Explain different types in detail.

3. What do you understand by term “Surveying “ ? Explain its classification.

UNIT- 3

1. What is ranging? Explain different methods of ranging.

2. Explain different types of tape corrections.

3. Explain various types of chains and tapes

4. Explain different types of tape corrections.

5. How can you take measurements in sloping ground, Explain it?

UNIT- 4

1. Explain different types of buildings.

2. What do you understand by building bye laws? Explain in brief.

3. Explain the concept of Sun light and ventilation in buildings.

UNIT- 5

6. Explain types and characteristics of various modes of transportation.

7. What are the causes of accidents? Explain in brief.

8. What is the need of traffic studies? Explain road safety measures.