Thursday 14 March 2013

Yevan Endru Ninaithai


Yevan Endru Ninaithai
Aethai Kandu Sirithai
Vithai Ondru Mulaikaiyil
Velipadum Muzhu Roopam

Neruppukku Piranthaan
Niththan Niththam Malarnthaan
Vaelai Vanthu Saerumbodhu
Velipadum Suyaroopam

Yar Endru Purigiratha
ivan Thee Endru Therigiratha
Thadaigalai Vendrae Sarithiram Padaiththavan
Nyabagam Varugiratha

Yaarukkum Adimai Illai
Ivan Yaarukkum Arasan Illai
Kaadugal Thaandi Kadakkindra Pozhuthum
kaatukku Kaayam Illai

Yavan Endru Ninaithai
Aethai Kandu Sirithai
Vithai Ondru Mulaikaiyil
Velipadum Pudhu Roopam

Neruppukku Piranthan
Niththan Niththam Malarnthaan
Vaelai Vanthu Saerumbodhu
Velipadum Suyaroopam

Allah-u-Raq Allah-Mae-Raq
Avarathu Adimaigal Aanoamae
Allah-u-Raq Allah-Mae-Raq
Avarathu Adimaigal Aanoam

Chinna Chinna Anuvaai Mannukkulae Kidapaan
Vettupadum Velaiyilae Velipadum Visshwaroopam
Enna Roopam Eduppan Evarukku Theriyum
Sonna Roopam Maatri Maatri Edupaan Vishwaroopam

Yar Endru Purigiratha
ivan Thee Endru Therigiratha
Thadaigalai Vendrae Sarithiram Padaiththavan
Nyabagam Varugiratha

Yaarukkum Adimai Illai
Ivan Yaarukkum Arasan Illai
Kaadugal Thaandi Kadakkindra Pozhuthum
kaatukku Kaayam Illai

Roopam Roopam Roopam Roopam
Roopam Roopam Roopam Roopam
Roopam Roopam Vishwaroopam


Allah-u-Raq Allah-Mae-Raq
Avarathu Adimaigal Aanoamae
Allah-u-Raq Allah-Mae-Raq
Avarathu Adimaigal Aanoam

Sainthu Sainthu Nee Paarkumbothu


Sainthu Sainthu Nee Paarkumbothu Adadaa Hey Hey..
Saernthu Saernthu Nizhal Pogumbothu Adada Hey Hey Hey..
Vizhiyodu, Vizhi Paesa,
Viralodu, Viral Paesa, Adada Veru Enna Pesa..
Sainthu Sainthu Nee Paarkumbothu Adadaa Hey Hey..
Saernthu Saernthu Nizhal Pogumbothu Adada Hey Hey Hey..
Hey Hey Hey..

En Thaayai Pola Oru Pennai Thedi
Unnai Kandu Kondaen..
Oh.. En Thanthai Thozhan, Ondraana Aanai
Naan Kandu Kondaen..
Azhagaana Un Koonthal Maakolam..
Athai Kaetkum Enthan Vaasal..
Kaalam Vanthu Vanthu Kolamidum..
Un Kannai Paarthaalae.. Mun Jenmam Povaenae..
Angae Neeyum Naanum Naam..

Sainthu Sainthu Nee Paarkumbothu Adadaa Hey Hey..
Saernthu Saernthu Nizhal Pogumbothu Adada Hey Hey Hey..

Kai Veesi Kaatril, Nee Paesum Azhagil, Meiyaagum Poiyum..
En Maarbil Veesum, Un Koonthal Vaasam, Aetho Seiyum..
En Veetil Varum Un Paatham.. Ennaalum Ithu Pothum..
Innum Innum Enna Tholai Thooraththil..
Aal Yaarum Paarkaamal Thadayangal Illamal,
Anbaal Unnai Naanum Kolvaen..


Sainthu Sainthu Nee Paarkumbothu Adadaa Hey Hey..
Saernthu Saernthu Nizhal Pogumbothu Adada Hey Hey Hey..
Vizhiyodu, Vizhi Paesa,
Viralodu, Viral Paesa, Adada Veru Enna Pesa..
Sainthu Sainthu Nee Paarkumbothu Adadaa Hey Hey..
Saernthu Saernthu Nizhal Pogumbothu Adada Hey Hey Hey..
Hey Hey Hey..

Wednesday 13 March 2013

ANTENNAS AND WAVE PROPAGATION--Question Bank



ECE Department
Question Bank
Subject Name : ANTENNAS AND WAVE PROPAGATION                       Branch:ECE
Subject Code  : 10144EC604                                                             Year / Sem. : III/VI
Unit – I
Part - A
1
Define retarded vector potential.

2
Define radiation resistance of an antenna.

3
Calculate the radiation resistance of a λ/10 wire dipole in free space.

4
An antenna whose radiation resistance is 300 ohm operates at a frequency of 1 GHz
    and with a current of 3Amp.Find the radiated Power.

5
What is meant by oscillating electric dipole?
6
Distinguish between induction field and radiation field.
7
 State the differences between half wave dipole and quarter wave monopole.
8
 Define: Electric vector potential.
9
A short vertical transmitting antenna erected on the surface of a perfectly
     conducting earth produce an rms field strength Eө=100sinӨ mv/m at a distance of
     1km from the antenna.calculate the total power radiated by the antenna.
10
Define antenna efficiency
11
Define Hertzian dipole.

Part - B
11
a)Derive an expression for the power radiated and radiation resistance of a small
          current element.  (8)
b) At what distance in wavelength, is the radiation component of magnetic field  
    be equal and twice the induction component.     (8)   
12
 a)When the amplitude of the magnetic field in a plane wave is 2A/m.
     i) Determine the magnitude of the electric field for the plane wave in free space.
     ii) Determine the magnitude of the electric field when the wave propagates in a medium which is characterized by σ =0, µ= µ0 and ε = ε0                                                   (8)       

b) Derive an expression for the radiation field from an infinitesimal Dipole
      and also write the expressions for far field and near field regions    (8)
13
a)Derive an expression for the radiation field from a half wave dipole            (10)

b) A dipole antenna with length equal to 10cm and carrying a current of 1A at a
         frequency of 108 /2π hertz radiates into free space. Calculate the electric field
         intensity at a distance of r=10km from the antenna, where the induction field is 
         negligible.                                                                                                            (6)


14
a)      Explain retarded vector potential.                                                (4)
      b)   A plane electromagnetic wave having a frequency of 100 MHz has an averaging pointing vector of 1 W/m2.If the medium is lossless with relative permeability 2 and relative permittivity 3. Find i) velocity of propagation. ii) Wavelength.                                  (12)
15
a)      Derive an expression for the radiation field from a small current element  (8)
b)      A half wave dipole is radiating into free space. The co-ordinate system is defined so that the origin is at the center of the dipole and the Z axis is aligned with the dipole. Input power to the diploe is 100W.Assuming an overall efficiency of 50%, find the power density (in w/m2) at r=500m, θ=60,φ=0.                                                      (8)

16
a)An antenna whose radiation resistance is 300 ohm operates at a frequency of 1 GHz and with a current of 3 amps. Find the radiated power.                                                   (3)
b)A half wave dipole with a total loss resistance of 1Ω, is connected to a generator whose internal impedance is 50+j25 Ω. Assuming that the peak voltage of the generator is 2 V and the impedance of the dipole excluding the loss resistance is 73+j42.5 Ω, find the power supplied by the source.                                                                                                        (3)
c) What do you mean by induction field and radiation field?                         (5)
d) Find the radiation resistance of a hertizian dipole of length λ/40, λ/60, and λ/80.   (5)



Unit – II
Part - A
1
Distinguish between broadside array and end fire array.
2
Define Ferrite loop.
3
An antenna has a radiation resistance of 72 ohm. A loss resistance of 8 ohm and power
 gain of 12 db. Determine the antenna efficiency and directivity.

4
What is the maximum effective aperture of a microwave antenna with a directivity of 900?
5
A linear broadside array consists of 4 equal isotropic in phase, point source with   λ /3 spacing. Calculate the directivity, beam width and HPBW.
6
State the reciprocity theorem for two antennas.

7
Define array factor.
8
What are grating lobes?
9
An antenna with omni directional amplitude pattern with a half power beam width of 90 degrees has radiation intensity of U=sinnq.Determine the value of ‘n’
10
State pattern multiplication
11
Define radiation intensity
12
Mention the two important advantages of folded dipole antenna
13
Give the significance of Friss transmission formula.

Part - B
1
a. Calculate the field for an array of two isotropic sources of same amplitude
          and phase for d=3l/4.                                                                                   (8)
 b. The radiation intensity of an antenna is given by
U (q,F) = {B0 sinq sin2F     , where 0£F£p, 0£F£p
       0                          , elsewhere.                                (8)
                Determine the maximum directivity

2
a.  Derive an expression for radiated field due to small circular loop  
           antenna.                                                                                                       (10)     
     b. Derive an expression relating directivity, gain and effective length.              (6)                                                                                                                    
3
    a. Show that the relative E (F) pattern of an array of two identical isotropic in
              phase point sources are arranged in fig 1.is given by E (F) = cos [dr/2 sin F
              where dr=2pd/l.                                                                                          (8)

    b. In a microwave communication link, two identical antennas operating at 10
            GHz are used with power gain of 40 db. If the transmitted power is 1 W. Find
            the received power, if the range of the link is 30 km.                                          (8)

4
.     a. Explain the operation of helical antenna in normal mode of operation.        (8)
b. A uniform linear array consists of 16 isotropic point sources with a spacing of
    l/4, if the phase difference d= -90 degrees. Calculate i) HPBW ii) Beam solid
    Angle iii) Effective aperture iv) Directivity.                                                   (8)


5
a) For an array of 2 isotropic point sources, fed with currents of same magnitude but, in phase quadrature, determine the radiation pattern. Evaluate the null directions and directions of maxima and draw the pattern.                                                                                  (10)
b) Explain the principle of pattern multiplication with an example.                        (6)
6
Derive  the formula to find the maxima, null points and half power points of an N element broadside  array and show that the first minor lobe is 13.46 dB down from the major lobe.(16)

Tuesday 12 March 2013

Apditude Questions(1-20) Date: 12-03-13



1: There is a toy train that can make 10 musical sounds. It makes 2 musical sounds after being
defective. What is the probability that same musical sound would be produced 5 times
consecutively? ( 1 of _____) ?
Answer: 1/2 * 1/2 * 1/2 * 1/2 * 1/2 = 1/32
32 will be the answer.
 

2: Peter and Paul are two friends. The sum of their ages is 35 years. Peter is twice as old as Paul was when Peter was as old as Paul is now. What is the present age of Peter?
Answer: 20 years.


3: The ages of two friends is in the ratio 6:5. The sum of their ages is 66.After how many years will the ages be in the ratio 8:7?
Answer: 12 years.
 

4: (There was a long story, I'll cut short it). There are 5 materials to make a perfume: Lilac,
Balsalmic, Lemon, Woody and Mimosaic. To make a perfume that is in demand the following
conditions are to be followed: Lilac and Balsalmic go together. Woody and Mimosaic go
together, Woody and Balsalmic never go together. Lemon can be added with any material.
(Actually they had also mentioned how much amount of one can be added with how much
quantity of the other; but that's not needed for the question.) All of the following combinations
are possible to make a perfume EXCEPT:
1) Balsalmic and Lilac
2) Woody and Lemon
3) Mimosaic and Woody
4) Mimosaic and Lilac
Answer: Mimosaic and Lilac.
 

 5: A girl has to make pizza with different toppings. There are 8 different toppings. In how many ways can she make pizzas with 2 different toppings.
Answer: 8 * 7 = 56

    
  6: A triangle is made from a rope. The sides of the triangle are 25 cm, 11 cm and 31 cm. What will be the area of the square made from the same rope?
Answer:280.5625
 

 7: What is the distance between the z-intercept from the x-intercept in the equation
ax+by+cz+d=0. (I do not remember the values of a,b,c,d)
 

 8: An athlete decides to run the same distance in 1/4th less time that she usually took. By how much percent will she have to increase her average speed?
Answer: 33.33%
 

 9: A horse chases a pony 3 hours after the pony runs. Horse takes 4 hours to reach the pony. If the average speed of the horse is 35 kmph, what s the average speed of the pony?
 

10: There is 7 friends (A1,A2,A3....A7).If A1 have to have shake with all with out repeat. How
many hand shakes possible?
 


 11: There are two pipes A and B. If A filled 10 liters in a hour B can fills 20 liters in same time. Likewise B can fill 10, 20, 40, 80,160….if B filled in (1/16) th of a tank in 3 hours, how much time will it take to fill completely?
Answer:7 hours
 

 12: (Keywords): Sports readers,10 tables,4chairs per table, each table has different number of people then how many tables will left without at least one person?
Ans : 6
 

 13: The ages of two friends is in the ratio 5:6. After how many years will the ages be in the ratio 7:8?
Answer: 10 years.
 

 14: What is the distance of the z-intercept from the x-intercept in the equation ax+by+cz+d=0. (I do not remember the values of a,b,c,d)
 

 15: An athlete decides to run the same distance in 1/4th less time that she usually took. By how much percent will she have to increase her average speed?
Answer: 33.33%
 

 16. A man whose age is 45 yrs has 3 sons named John,jill,jack. He went to a park weekly
twice.he loves his sons very much. On a certain day he find # shopkippers sailing different
things. An apple cost 1penny, 2chocalate costs 1penny.& 3 bananas cost 1 penny. He has
bought equal no. of apple, chocolate & banana for each son. If the total amount he invest is
7 penny then how many he has bought from each piece for his son?
a)1app,1cho,1 banana
b)1 app,2cho,3 banana
c)1app,2cho,1banana
 

 17. A scientist was researching on animal behavior in his lab. He was very interested in
analyzing the behavior of bear. For some reason he travelled 1mile in north direction & reached at north pole.there he saw a bear .he then followed the bear around 1 hr with a speed of 2km/hr in east direction.After that he travelled in south direction & reached at his lab in2 hrs. Then what is the colour of the bear? I think ans is white
a)white b)black c)gray d)brown
 

 18. In a particular city there are 100 homes numbered from 1,2,3………..100. Thecity was
build by a builder from chennei. There was 45 shop in the town which was build by a
builder from Mumbai. THE 2nd builder can build the in ½ time as compared to 1st builder. If the 2nd builder builds in 15 days,then how many 2’s are used by the builder from Chennai in numbering the 100 homes?
a)17 b)18 c)19 ans d) 20 c)19
 

 19.MR dash has 3 sons whose ages are respectively a,b,c. The grandfather has bought a
cycle for the eldest son, mother has bought a bag for the youngest one which cost Rs150/.
The sum of two age of the elder son & one son is 15.The difference of age of sons is 3 &
2.Then what is the age of the eldest son?
a)10, b)11, c) 12,d)13
 

 20. We all know that Arya bhatta is the greatest mathematics belongs to india . When his
daughter Mayabati was in her teen age he discovered a problem. At that time the age of
mayabati is a prime number,let that age is a. After some years her age becomes b. then
Arya Bhatta was able to solve that problem wit the help of he daughter mayabati. If a-b=5
& product of a& b is 26 then what is the sum of two squares?
A)77 b) 45 c)89 d)67

Share this...Useful One..

Dear All,


Please don't Ignore this without Reading.
Let it reach the 110 Crores Indians and the remaining if any. Kindly, share this valuable information wherever possible.

1. If you see children Begging anywhere in INDIA , please contact:
"RED SOCIETY" at 9940217816. They will help the children for their studies.


2.
Where you can search for any BLOOD GROUP, you will get thousand's of donor address. www.friendstosupport.org

3.
Engineering Students can register in www.campuscouncil.com to attend Off Campus for 40 Companies.

4.
Free Education and Free hostel for Handicapped/Physically Challenged children.
Contact:- 9842062501 & 9894067506.


5.
If anyone met with fire accident or people born with problems in their ear, nose and mouth can get free PLASTIC SURGERY done by Kodaikanal PASAM Hospital .Everything is free. Contact : 045420-240668,245732
"Helping Hands are Better than Praying Lips"


6.
If you find any important documents like Driving license, Ration card, Passport, Bank Pass Book, etc., missed by someone, simply put them into any near by Post Boxes. They will automatically reach the owner and Fine will be collected from them.

7. By the next 10 months, our earth will become 4 degrees hotter than what it is now. Our Himalayan glaciers are melting at rapid rate. So let all of us lend our hands to fight GLOBAL WARMING.
-Plant more Trees.
-Don't waste Water & Electricity.
-Don't use or burn Plastics

8. It costs 38 Trillion dollars to create OXYGEN for 6 months for all Human beings on earth.
"TREES DO IT FOR FREE"
"Respect them and Save them"


9. Special phone number for Eye bank and Eye donation: 04428281919 and 04428271616 (Sankara Nethralaya Eye Bank). For More information about how to donate eyes plz visit these sites.
http://ruraleye.org/

10. Heart Surgery free of cost for children (0-10 yr) Sri Valli Baba Institute Banglore. 10.
Contact : 9916737471

11.
Medicine for Blood Cancer!!!!
'Imitinef Mercilet' is a medicine which cures blood cancer. Its available free of cost at "Adyar Cancer Institute in Chennai". Create Awareness. It might help someone.
Cancer Institute in Adyar, Chennai
Category: Cancer
Address:
East Canal Bank Road , Gandhi Nagar
Adyar
Chennai -600020
Landmark: Near Michael School
Phone: 044-24910754 044-24910754 , 044-24911526 044-24911526 , 044-22350241 044-22350241


12.
Please CHECK WASTAGE OF FOOD
If you have a function/party at your home in India and food gets wasted, don't hesitate to call 1098 (only in India ) - Its not a Joke, This is the number of Child helpline.
They will come and collect the food. Please circulate this message which can help feed many children.
AND LETS TRY TO HELP INDIA BE A BETTER PLACE TO LIVE IN
Please Save Our Mother Nature for
"OUR FUTURE GENERATIONS"

Sunday 10 March 2013

PSNA cet:::::About My College(PSNA CET) , PSNA Progress , PSNA CET- Progress, PSNA College , PSNA

  • CLICK HERE   to see your Progress on PSNA CET.

About My College:


 


PSNACET is a premier institution in Tamilnadu with International standards. It was established in 1984 at the outskirts of Dindigul township as a response to the clarion call made by the public for a quality engineering institution in this part of South Tamilnadu. This prestigious institution, at present, offers 7 UG courses and 8 PG courses in Engineering and also MCA and MBA. 

The students in India, by and large, are inundated with plenty of choices at the higher education level due to steady rise in educational institutions, Any student who has just completed his higher secondary course and who does not have a specific plan will be bewildered forever in choosing a good institution from among many. As an answer to this question whether there are any parameters which enable an aspirant to demarcate a good institution from the rest-there are two essential parameters. They are the award of accreditation given by NBA of AICTE, New Delhi and the Best Engineering College Award given by ISTE, New Delhi. 

In this context, it is modestly stated that PSNACET went for accreditation in 2003 and got all its UG courses accredited for a period of 3 years. Since then, our institution made rapid strides in academic performance, infrastructure development, employability of its graduates, staff welfare, service to the society, strengthening its industry institution interaction, and research and extension work, These hardest efforts were well appreciated by the National Board of Accrediation (NBA), when the institution went for a renewal of accreditation in the year 2006. This time all UG courses along with MCA and MBA courses have been given 5 years of accreditation -the highest recognition that NBA awards to the standard, quality engineering institution.

Now, PSNA College of Engineering & Technology is fittingly given the Bharatiya Vidya Bhavan National Award for an Engineering College having Best overall performance for the year 2007, at the National level. 



Under Graduate Degree:


Programme
Duration
B.E. - Civil  Engineering




4 years Comprising
8 semesters
B.E. - Mechanical   Engineering
B.E. - Electronics and Communication  Engineering
B.E. - Electrical and Electronics Engineering
B.E. - Computer Science and Engineering
B.Tech. - Information Technology
B.E. – Bio-Medical Engineering

Post Graduate Degree :



Programme
Duration
M.E-. Power Electronics & Drives



2 Years Comprising    
4  Semesters
M.E- Applied Electronics
M.E-Computer Science and Engineering
M.E- Computer and Communication
M.E-VLSI Design
M.Tech – Remote Sensing
MBA – Master of Business Administration
MCA – Master of Computer Applications
3 Years Comprising
6 Semesters

MileStones:

Monday 4 March 2013

Azhago Azhagu Aval Kannazhagu-Lyrics

          ::: SAMAR FILM:::

Azhago Azhagu Aval Kannazhagu
Avalpol Illai Oru Paerazhagu
Aghago Azhagu Aval Paechazhagu
Arugil Aerikkum Aval Moochazhagu

Azhago Azhagu Aval Kannazhagu
Avalpol Illai Oru Paerazhagu
Aghago Azhagu Aval Paechazhagu
Arugil Aerikkum Aval Moochazhagu

Thathi Nadakkum Aval Nadai Azhagu
Pathi Aeriyum Aval Udai Azhagu
Aiyaiyo Chikena Nadakkum Aiyaiyo Oviyam Avalo
Aiyaiyo Sakarai Thadavi Aiyaiyo Senjathu Udala
Azhago Azhagu Aghago Azhagu

Entha Poovil Irunthu Vanthathintha Thaeno
Endru Enni Viyakkum Ithazh Azhagu
Anthiyiila Vaanam Sivanthathai Polae
Kannam Engum Thoandrum Vetkkam Azhagu
Melidaiyai Patri Sonnal Illatha Azhagu
Maelae Konjam Paarka Sonnal Pollatha Azhagu
Kadavul Kavithai Ondrai Padaithathai Ènna Šølavø.. Oø..

Kaataruvi Pølae Alai Alaiyaga
Kandabadi Oadum Kuzhal Azhagu
Kanirandil Valayai Pinni Pinni Veesi
Nenjam Athai Parikkum Šeyal Azhagu
Thetrupal Širikkayil Theeratha Azhagu
Thallinindru Yøsikkayil Vaerethø Azhagu
Kadavul Kavithai Ondrai Padaithathai Ènna Šølavø.. Oø..

Azhagø Azhagu Aval Kannazhagu
Avalpøl Illai Oru Paerazhagu
Azhagø Azhagu Aval Paechazhagu
Arugil Aerikkum Aval Møøchazhagu

Thathi Nadakkum Aval Nadai Azhagu
Pathi Aeriyum Aval Udai Azhagu
Aiyaiyø Chikena Nadakkum Aiyaiyø Oviyam Avalø
Aiyaiyø Šakarai Thadavi Aiyaiyø Šenjathu Udala
Aiyaiyø Aiyaiyø Aiyaiyø Aiyaiyø

Popular Posts