Birla Institute of Technology & Science, PHani Work-Integrated Learning Programmes Division

Second Semester 2012-2013 Mid-Semester Test (EC-2 Regular)

: ENGG ZClll : ELECTRICAL & ELECTRONICS TECHNOLOGY : Closed Book

Course No. Course Title Nature of Exam Weightage Duration Date of Exam

: 35% : 2 Hours : 10/02/2013 (AN)

No. of Pages = 2 No. of Questions = 5

Note: I . Please follow all the Instructions to Candidates given on the cover page of the answer book. 2. All parts of a question should be answered consecutively. Each answer s~ould start from a fresh page. 3. Assumptions made if any, should be stated clearly at the beginning of your answer.

r>.~ circuit consisting of three resistances 120, 180 and 360 respectively, joined in /,1. ;arallel, is connected in series with a fourth resistance. The whole is supplied at 60V and

it is found that the power dissipated in 120 resistance is 36W. Determine the value of fourth resistance and total power dissipated in the group. [7]

Q.2. Using Thevenin's theorem to determine 10 in figure 1 shown below: [7]

-lA

I mr 3VC) 60 y:o i SO

I \Ny ! • Figure 1

Q.3. For the network shown in figure 2: (a) Determine the mathematical expressions for variation of the voltage across the

capacitor and current through the capacitor as a function of time, following the closure of the switch at t=O on to position 1;

(b) The switch is closed on to position 2 when t=IOOms: determine the new expressions for capacitor voltage and current as a function of time. [7]

Rl I Z L

~ ltl" 1 tWill

c Rl 200 ·n

I O.l pF

Figure 2

ENGG ZC111 (EC-2 Regular) Second Semester 2012-2013 Page 1 of2

ENGG ZC111 (EC-2 Regular) Second Semester 2012-2013 Page 2

QA. A coil having resistance of 4 n and a constant inductance of 2H is switched across 20Y d.c. supply. Calculate

(a) the time constant (b) the final value of current (c) the value of current 1.0s after the switch is closed. [7]

Q.S . A capacitor of 8~F takes a current of lA when the alternating voltage applied across it is 230Y. Calculate:

(a) The frequency of applied voltage (b) The resistance to be connected in series with the capacitor to reduce the current in

circuit to O.SA at the same frequency ( c) The phase angle of resulting circuit. [7]

******

ENGG ZClll (EC-2 Regular) Second Semester 2012-2013 Page 2 of2

Birla Institute of Technology & Science, Pilani Work-Integrated Learning Programmes Division

Second Semester 2012-2013

: MGTS ZC21 1

Mid-Semester Test (EC-2 Regular)

: PRINCIPLES OF MANAGEMENT : Closed Book

Course No. Course Title Nature of Exam Weightage Duration Date of Exam

: 35% : 2 Hours : 09/02/2013 (FN)

No. of Pages = 1 No. of Questions = 5

Note: I. Please follow all the Instructions to Candidates given on the cover page of the answer book. 2. ' All parts of a question should be answered consecutively. Each answer should start from a fresh page. 3. Assumptions made ifany, should be stated clearly at the beginning of your answer.

Q.l. How does a manager's job change with hislher level in the organization? Explain considering functional, Mintzberg's role and skill approach to management [7]

Q.2. Explain the contribution of Hawthorne studies to Management. How is human resource approach applied today? [7]

Q.3. What are the methods by which an enterprise can enter other countries? [7]

Q.4. List and discuss different types of giOwth corporate strategies. Include specific examples of companies that pursue each of these growth strategies [7]

Q.5. What are the factors that determine ethical and unethical behaviour of an individual when faced with ethical dilemma? [7]

**********

Birla Institute of Technology & Science, PHani Work-Integrated Learning Programmes Division

Second Semester 2012-2013

Mid-Semester 2012-2013 (EC-2 Regular)

C01ll'se ~ame : lvlATH ZC161 Course Title : Engineering rv'Iathematics - I ~ature of Exam: Closed Book Weightage : 35% D uratioll : 2 Hours Date of Exam : 09/ 02/ 2013 (AN ) ;;.;r ote:

No. of Pages = 01 No. of Questions = 05

1. P lease follow all the ILst ructions to Ca:ndidates given on the cover page of the answer book. 2. All parts of a question should be answered consecutively. Each answer should start from a fresh page. 3. Assumpt ions made if allY, should be stated clearly at the beginning of your answer.

( 2 1) ./ Q. 1. Suppose A = ~; . Show that the matrix B = AAT is symmetric.

/' Q. 2. Solve the following system of equations by Cramer 's rule

= -4.

,...- Q. 3. Find the eigenvalues and eigenvectors of the matrix A = (~ _~). <' Q. 4( a). Evaluate the following limit:

1. X2 + X - 2 nn --,----

x-+l :r2 - ;c

dy x2 + sin x (b). Find dx where y = x3 + cosx .

Q. 5. Evaluate the following integral:

J x+4 dx. x 3 + 3x2 - lOx

~, ~

[6]

[8]

[7]

[4]

[4]

[6]

Birla Institute of Technology & Science, Pilani Work-Integrated Learning Programmes Division

Second Semester 2012-2013

Mid-Semester Test (EC-2 Regular)

Course No. Course Title Nature of Exam Weightage Duration

: TA ZC312 : TECHNICAL REPORT WRITING : Closed Book : 35% : 2 Hours

No. of Pages = 2 No. of Questions = 3

Date of Exam : I 0/02/2013 (FN) Note: I. Please follow all the Instructions to Candidates given on the cover page of the answer book. 2. All parts of a question should be answered consecutively. Each answer should start from a fresh page. 3. Assumptions made jf any, should be stated clearly at the beginning of your answer.

Q.l. Do you agree that ,in its final form ,communication is a manifestation of the personalities of both the sender and the receiver? Discuss. [10]

Q.2. It is the audience which acts as the main factor in determining what your presentation contains and what it does not .In the light of the above statement, choose a topic of your choice for a presentation and briefly explain, in about 150 words, how you would change the opening of the presentation to suit the following different audience: [10] (a) Students (b) Audience that has no knowledge of the topic (c) Experts on the topic

Q.3. Write a Precise for the passage given below: [ 15]

The best definition of an adult that was ever given is one who has stopped growing at both ends and has begun to grow in the middle. But no one has ever given a good definition of a teenager.

George Bernard Shaw once said, ' It is a pity that youth has been wasted on the young'. The contrary is true. It is no secret at all that the Good Lord knew, it was better to put the illusions of light at the beginning, in order that as we grew closer to eternity, we might better see the purpose of living.

Since we cannot think of a good definition of a teenager, possibly it would be interesting to discuss the psychology of the teenager. The psychology of the teenagers may be reduced to three dominant characteristics: self consciousness, imitativeness and restlessness.

The difference between a child and a teenager is that a child wants to be loved, a teenager wants to Jove. The affection of free choice are preferred to the natural affections in 'the family.

When the teenager emerges, he discovers his own personality and begins to affirm his ego. A teenager is like a chick just breaking the shell in which he has been confined - the shell of the family- and beginning to find himself in a great, broad world.

TA ZC312 (EC-2 Regular) Second Semester 2012-2013 Page 10/2

TA ZC312 (EC-2 Regular) Second Semester 2012-2013 Page 2

Identification bracelets begin to appear: 'its me'. Up to this point, his life has been merged very much in the family. If the parents say, 'We are going to visit Aunt Jane today', the child has to go. But the teenager puts up an arguments; he refuges to be a part of an anonymous group. His personality asserts itself, saying, '1 don't want to go.' This is the age when the boy begins to carry a comb, and the girl wins the battle of lipstick. The only word in which they feel at home is with fellow teenagers.

Hence they have a language of their own. Only in their own mIlieu do they feel they are understood.

They are proud of it when nobody understands them. Ordinary words have little exchange value, particularly with adults. There is much they would have to say if they could find words. Fear of being misunderstood drives them to silence or else to bebop talk, which only the initiated can understand. '

In addition to that, they love to wear clothes that attract attention. They feel that there is a kind of conspiracy against their own ego which they resist by over asserting themselves. The boys wear socks that are so loud their feet can never go to sleep. Girls do their hair a thousand different ways to express various personalities. There is a fondness for writing names on fences, driving hot rods, making loud noises on street corners and in buses, in order that people may be conscious that here, at last, a personality is beginning to emerge. Gestures are quick, gauche, and awkward. Sloppiness is cultivated to attract attention; feelings are easily hurt. But all these are signs that a personality is being born into the adult world, and democracy is founded on personalities. Be not too hard on them.

The second characteristic of the teenager is imitation. The ego must emerge from its inferiority. It may do it in one of two ways, either by creation or by imitation. If the teenager is keen on developing his own character, being himself and not someone else, then he creates; he assumes responsibility; he has a sense of value, and he discovers the purpose of life and concentrates on the development of his character in a constructive way. His is willing to say 'No' to certain things. He resists the crowd and the mob, knowing that the crowd and the mob are often wrong. There are not many, however, who are creative, even the minority.

The third characteristic of a teenager is restless. The teenager is like mercury which can be dispersed in several directions. The restlessness is due in part to the discovery of vital and biological impulses stirring within.

Th~ body - imperative is more immediate than the so~ - imperative. Hence, the teenager finds perseverance difficult and the long attention to the same subject almost impossible. It is this fidgety quality which most tries the patience of adults. He discovers less the laws than the illusion life. This tremendous physical energy is ready to spend itself on a tackling dummy or jitterbugging but almost completely disappears when mother wants the screens put up in the spring.: time. Puppy love, crushes and infatuations are common, There are friendships that seem closer than the friendship of teenager and yet there are hardly any friendship that are quite as . volatile. Adults must remember, however, that this urge for affection, for love, for friendship, for society, is good and right. God put it in them and it is not to be crushed, but developed along right lines. (822words)

***********

TA ZC312 (EC-2 Regular) Second Semester 2012-2013 Page 2 of2