Friday, April 30, 2010

Innovation varsities face site problem

New Delhi: The Prime Minister's Office, according to sources, is rethinking their earlier decision for letting 14 renowned innovation universities to be set up in places that were selected during former Human Resource Development (HRD) Minister Arjun Singh's tenure.The decision was put on hold becau...

Wednesday, April 28, 2010

Read more on Capacitors

Follow the link below to read on

  • Various types of capacitor

  • Factors Affecting Capacitance

  • Capacitor Networks

  • Charging and Discharging Capacitors

Click Here to Visit the details

An Introduction to Capacitance

Capacitance is the property of an electric conductor that characterizes its ability to store an electric charge. An electronic device called a capacitor is designed to provide capacitance in an electric circuit by providing a means for storing energy in an electric field between two conducting bodies.

Read more and watch the interactive JAVA tutorial HERE

Physics articles from the Nobel Prize website

History of the Nobel Prize in Physics

Physics Laureates and Their Work

Laureates' Workplace

Other Articles

Visit the site HERE

Java Simulations for Physics Teaching and Learning

A good collection of java simulations for teaching and learning Physics

Visit the link below

Java Simulations in Physics

How to solve Problems in Physics

Physics Problem solving strategy

Two factors can help make you a better physics problem solver.  First of all, you must know and understand the principles of physics.  Secondly, you must have a strategy for applying these principles to new situations in which physics can be helpful.  We call these situations problems.  Many students say, “I understand the material, I just can’t do the problems.”  If this is true of you as a physics student, then maybe you need to develop your problem-solving skills.  Having a strategy to organize those skills can help you.

Read more Here

International Physics Olympiad website

Visit the the website giving the previous question Papers and solutions of all the previous International Physics Olympiads and the solutions.

The site also give details of the past and the coming Olypiads.

Click the Link below to visit the site

International Physics Olympiads
An annual competition for secondary school students

Unhealthy Lifestyle Adds Up to Big Mortality Effect

The "four horsemen" of bad health -- poor diet, inactivity, smoking, and excessive drinking -- may indeed add up to a personal apocalypse, researchers have found.

Tuesday, April 27, 2010

FAQ section for plustwo Physics

We have started a new Physics FAQ section for publishing frequently asked questions and answers in Physics by various Boards and schools. The FAQ section will also include questions from visitors and their answers.

Visit the FAQ section here.

Monday, April 26, 2010

AIEEE 2010 baffles students with new marking scheme

Bangalore: The All India Engineering Entrance Examination (AIEEE) which was held on Sunday had a 'moderate' difficulty level despite of the paper being set on the expected lines of students, leaving them baffled with the differential marking scheme.Although the AIEEE had given it a skip in its 2009 ...

Saturday, April 24, 2010

Capacitance Study Materials and numerical problems for practice

Important concepts and formulas from CAPACITANCE
Conceptual Problems (Solved) from CAPACITANCE
Unsolved Numerical Problems for Practice from CAPACITANCE
Solved Numerical Problems from CAPACITANCE


Taking another step towards reforming the education system by making it more student-centric, the Central Board of Secondary Education has "advised" teachers in affiliated schools to act more as facilitators than instructors by cutting down on teacher-talking time and instead enabling more peer-group learning.
In a recent set of guidelines spelling out, in no uncertain terms, the curriculum to be followed in Classes IX and X in CBSE schools, the board has asked teachers "to reduce teacher-talking time to the minimum; encourage classroom interaction among peers, students and teachers; take up questions for discussion to encourage pupils to participate, and to marshal their ideas and express and defend their views."

Academics say it is important that teachers speak less in class in order to adopt a constructive approach towards a student's learning and development. "The child must discover things for itself. Unfortunately, in our country teacher training schools still advocate the teacher talk method. Such guidelines will allow the teacher to look at other teaching methodologies, some of which have been prescribed," says Neera Chopra, an educational consultant based in Delhi who has worked with several schools in Delhi and abroad, and is an expert on the continuous and comprehensive evaluation suggested by the CBSE in all affiliated schools.

"In the schools that I visit, I often come across children who say they are able to understand 60% from the textbooks, and that teachers make the whole learning experience boring by trying to explain things to them. Instead, teachers should focus on guiding children to the right places to look for information, not by explaining everything in textbooks," she says.

While the guidelines break several barriers by making rote learning infeasible and instead focussing on learning by doing, there are fears that such precise instructions could stifle a teacher's spontaneity and tendency to innovate in the classroom.

A facilitator makes learning happen by demystifying the process of learning and making students autonomous learners.

It is believed by many educators now that facilitation is a never ending function of a teacher who continually develops and supports the learning potential of students.

As a teacher, what is your opinion? Let's interact and discuss. Post your comments and ideas.


Thursday, April 22, 2010




A problem for IIT JEE aspirants

Consider the shown arrangement in which a thin rope ‘A’ with a linear density mA is connected to a thick rope ‘B’ with linear mass density mB. The thick rope passes over a pulley and is connected to a heavy block of mass M. The separation of fixed support S from a pulley is L. A stationary wave is setup in this composite string such that the joint remains a node. Given that mb = 4 kg/m, ma = 0.4 kg/m, M = 1 kg and L = 4l = 1 m. Under these conditions, find:

  1. The least possible frequency of vibration

  2. The total energy of vibration if the amplitude for both the string is A = 1 mm and the string vibrates at the frequency obtained in (a).

Download Model Question Paper for TN Plustwo Physics

Click the link to download

UPSC announces Engineering Services Exam 2009 result

New Delhi: The Union Public Service Commission (UPSC) has announced the results of the Engineering Services Examination, 2009. The examination for these services was held in June 2009 and the interviews for Personality Test held in February - March 2009. A total of 469 candidates have been recomm...


Theoretical problem one,
answer, and answer form.

Theoretical problem twoanswer, and answer form.

Theoretical problem threeanswer, and answer form.

Instructions for Experimental examExperimental problem oneanswer, and answer form.

Experimental problem twoanswer, and answer form.

Links to the websites of some past International Physics Olympiads

26th International Physics Olympiad -1995

27th International Physics Olympiad - 1996

28th International Physics Olympiad - 1997

29th International Physics Olympiad - 1998

30th International Physics Olympiad - 1999

31st International Physics Olympiad - 2000

32nd International Physics Olympiad - 2001

33rd International Physics Olympiad - 2002

34th International Physics Olympiad - 2003

35th International Physics Olympiad - 2004

36th International Physics Olympiad - 2005

37th International Physics Olympiad - 2006

38th International Physics Olympiad - 2007

38th International Physics Olympiad - 2008

39th International Physics Olympiad - 2009, Mexico


To view the papers, click on the links.

NSE Astronomy
Senior level sample paper
Junior level sample paper
Astronomy Senior Level Examination - November 2007
Astronomy Junior Level Examination - November 2007

NSE Physics

Physics Examiantion - November 2007
NOTE: There is correction in Physics answersheet as follows
Q 23
:-  b
Q 31 :-  d
Q 41 :- Use the expression for periodic time T = 2 π m / Bq , for radius of the circular path r = mv sinθ / Bq and for the pitch of the helical path p = T (v cosθ) where the symbols have their usual meanings. With these expressions we get a = 1, b = 1 / √3 and c = √3. So 'no option is correct'.

NSE Chemistry

Chemistry Examination - November 2007
NSE Biology
Biology Examination - November 2007


NGPE question paper - January 2008

Tuesday, April 20, 2010

SC students to receive scholarships for higher studies abroad

New Delhi: Eligible Scheduled Caste (SC) students are being offered scholarships for pursuing higher studies abroad under 'National Overseas Scholarship for SC etc. Candidates' scheme, Minister of State for Social Justice and Empowerment, D. Napoleon said today. The scholarship includes annual maint...

Monday, April 19, 2010

CBSE Class XI : Selected Questions for practice and quick revision

1. State the principle of conservation of angular momentum and explain its applications.
2. Define radius of gyration
3. Establish equation of continuity of an ideal liquid flow
4. Explain the variation of acceleration due to gravity with (a) altitude (b) depth
5. State Kepler’s laws of planetary motion
6. Define escape velocity and derive an expression for the escape velocity of a body on the surface of earth.
7. State theorem of perpendicular axis and the theorem of parallel axes.
8. Show that the oscillations of a simple pendulum are simple harmonic.
9. What are beats? How are they produced?
10. What is Doppler Effect?
11. State Carnot’s theorem.
12. Describe Carnot’s cycle. (Draw graph)
13. State the three laws of thermo dynamics (Zeroth law, first law and second law)
14. Apply I law of thermodynamics to (a) isothermal process (b) adiabatic process
15. Derive an expression for the work done in an isothermal process
16. Find the angle of projection for a projectile motion whose range R is 4 times the maximum height H.
17. The airplane shown is in level flight at an altitude of 1 km and a speed of 200 km/h. At what distance ‘S’ should it release a heavy bomb to hit the target X? Take g = 10 m/s2.
18. At what temperature is the Fahrenheit scale reading equal to half that of the Celsius scale?
19. What is a simple harmonic motion? State its characteristics.
20. What is capillarity? Derive an expression for capillary ascent.
21. Define surface tension.
22. Derive an expression for velocities after collision when two bodies undergo perfectly elastic collision in one dimension.
23. State triangle law of vector addition. Find out the angle between the resultant vector and the vector A when two vectors A =3m is acting towards east and vector B=4m is acting towards the north east.
24. Prove work-energy theorem for a variable force.
25. The moments of inertia of two rotating bodies A and B are IA and IB (IA > IB) and their angular momenta are equal. Which one has greater kinetic energy?
26. Derive an equation for the work done in an isothermal process and draw the P-V indicator diagram.
27. Deduce an expression for the total energy of a system executing S.H.M. Draw the energy curve.’
28. What do you mean by standing wave? Deduce an expression for the nodes and antinodes of a standing wave. Write down the positions of nodes and antinodes.
29. Friction is a necessary evil, comment. Mention some methods of reducing friction.
30. State Bernoulli’s principle. Deduce an expression for the volume of the liquid flowing per second through the wider tube of a venturi meter.
31. What do mean by damped oscillation?
32. What is resonance in oscillations?
33. What is the work done by the force of gravity on a satellite moving round the earth? Justify your answer?
34. A light body and a heavy body have the same momentum which of the two bodies will have greater kinetic energy?
35. When is work done by the force is negative? Give condition for work to be positive?
36. Define one newton.
37. Distinguish between free, forced, and resonant oscillation with illustration.
38. Explain displacement, velocity, acceleration, and time period of a simple harmonic motion. Find relation between them.
39. State and explain superposition of waves.
40. Discuss the characteristics of stationary waves.
41. Explain the need of banking of tracks.
42. Explain why a gas has two specific heats?
43. The momentum of a body increases by 20%. What is the percentage increase in kinetic energy?
44. Calculate the energy spent in spraying a drop of mercury of 1cm radius into 106 droplets, all of same size. Surface tension of mercury is 55´10-2 Nm-1.
45. From kinetic theory of gas, find an expression for pressure exerted by gas on the walls of container.
46. Define orbital velocity of a satellite and derive an expression for orbital velocity.
47. Derive Stoke’s law by the method of dimensions.
48. Why does a freely falling body experience weightlessness?
49. Derive an expression for the apparent weight of a person in a lift when (a) the lift is moving up with acceleration (b) moving down with acceleration (c) moving up with acceleration (d) moving down with deceleration (e) moving up or down with constant velocity.
50. State Hooke’s law of elasticity. Draw stress vs strain for a wire subjected to gradually increasing tension and explain the various points of the curve. (Elastic region, proportional limit, elastic limit, plastic region, yield point and breaking point)
51. State Torricelli’s theorem and prove it. (Derive an expression for velocity of efflux)
52. Define thermal conductivity.
53. Explain the principle and working of carnot refrigerator.
54. Show that Cp is greater than Cv
55. Distinguish centre of mass and centre of gravity.
56. What are geostationary satellites?
57. Define Young’s modulus, bulk modulus and rigidity modulus.
58. State Pascal’s law and explain any one application. (Hydraulic brakes, hydraulic lift, hydraulic press)
59. Derive the relation L=I for a rigid body
60. Show that it is easier to pull a lawn roller than to push it.

Saturday, April 17, 2010

IPL in Phyiscs

IPL stands for Introductory Physics Laboratory and here is the link
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Friday, April 16, 2010

A Question based on Pulleys

In a single fixed pulley the velocity ratio is always more than mechanical advantage. Why?

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Take an online test from Kinematics and get grading instantly

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Giancoli Physics solutions

Visitors can now post questions from Giancoli Physics and we will post the solutions.

Questions already given in the text book will be entertained.

Full download of the complete solutions to Giancoli Physics 6th edition available here


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Tourism Minister gives away awards to Hospitality Institutes

New Delhi: The Minister of State for Tourism, Sultan Ahmed today gave away the National Awards for Excellence in Hospitality Education for the year 2008-09.Speaking on the occasion he said, "The Ministry of Tourism is making all efforts to expand the institutional infrastructure for training in the ...

Wednesday, April 14, 2010

India needs you, Pranab Mukherjee tells students

New Delhi: Reiterating that the India will return to a nine percent growth soon, Finance Minister Pranab Mukherjee on Tuesday urged the student community to serve at home and not leave the country for greener pastures."While abundant opportunities await the graduating students, as you begin your car...

Sunday, April 11, 2010

CBSE Results 2010

CBSE Results will be published in the following website

CBSE Results Link 1

CBSE Results Link 2

Eligibility Criteria for IIT JEE

Candidates must make sure that they satisfy all the eligibility conditions given below for appearing in JEE-2010:

Date of Birth
The date of birth of candidates belonging to GE, OBC and DS categories should be on or after October 1,1985. Whereas the date of birth of those belonging to SC, ST and PD categories should be on or after October 1,1980.
The date of birth as recorded in the high school/first Board/ Pre-University certificate will be accepted. If the certificate does not mention the date of birth, a candidate must submit along with the application, an authenticated document indicating the date of birth.

Year of passing Qualifying Examination (QE)
A candidate must have passed the QE for the first time, after October 1, 2008 or in the year 2009 or will be appearing in 2010.
Those who are going to appear in the QE later than October 1, 2010 are not eligible to apply for JEE-2010.
The qualifying examinations (QE) are listed below:
i) The final examination of the 10+2 system, conducted by any recognized central / state Board, such as Central Board of Secondary Education, New Delhi; Council for Indian School Certificate Examination, New Delhi; etc.
ii) Intermediate or two-year Pre-University examination conducted by a recognized Board / University.
iii) Final examination of the two-year course of the Joint Services Wing of the National Defence Academy.
iv) General Certificate Education (GCE) examination (London/Cambridge/Sri Lanka) at the Advanced (A) level.
v) High School Certificate Examination of the Cambridge University or International Baccalaureate Diploma of the International Baccalaureate Office, Geneva.
vi) Any Public School/Board/University examination in India or in any foreign country recognized as equivalent to the 10+2 system by the Association of Indian Universities (AIU).
vii) H.S.C. vocational examination.
viii) Senior Secondary School Examination conducted by the National Institute of Open Schooling with a minimum of five subjects.
ix) 3 or 4 year Diploma recognized by AICTE or a state Board of technical education. In case the relevant qualifying examination is not a public examination, the candidate must have passed at least one public (Board or Pre-University) examination at an earlier level.

Minimum Percentage of Marks in QE
Candidates belonging to GE, OBC and DS categories must secure at least 60% marks in aggregate in their QE. Whereas, those belonging to SC, ST and PD categories must secure at least 55% marks in aggregate in the QE.
The percentage of marks awarded by the Board will be treated as final. If the Board does not award the percentage of marks, it will be calculated based on the marks obtained in all subjects listed in the mark sheet. If any Board awards only letter grades without providing an equivalent percentage of marks on the grade sheet, the candidate should obtain a certificate from the Board specifying the equivalent marks, and submit it at the time of counselling/ admission. In case such a certificate is not provided then the final decision rests with the Joint Implementation Committee of JEE-2010.
4. Important Points to note
(i) One can attempt JEE only twice, in consecutive years. That means one should have attempted JEE for the first time in 2009 or will be appearing in 2010.
(ii) Those who have accepted admission after qualifying in JEE in earlier years by paying full fees at any of the IITs, IT-BHU, Varanasi or ISM, Dhanbad, are NOT ELIGIBLE to write JEE at all irrespective of whether or not they joined in any of the programmes.
(iii) The year of passing the Qualifying Examination is the year in which the candidate has passed, for the first time, any of the examinations listed above, irrespective of the minimum percentage marks secured.
(iv) The offer of admission is subject to verification of original certificates/ documents at the time of admission. If any candidate is found ineligible at a later date even after admission to an Institute, his/ her admission will be cancelled automatically.
(iv) If a candidate is expecting the results of the QE in 2010, his/her admission will only be provisional until he/she submits the relevant documents. The admission stands cancelled if the documents are not submitted in original to the concerned institute before September 30,2010.
(v) If a candidate has passed any of the examinations, listed in Sub-section III.2, before October 1,2008, he/she is not eligible to appear in JEE-2010.
(vi) If a Board invariably declares the results of the QE late (only after September 30, every year), the candidate is advised to attempt JEE in 2011 or later.
(vii) The decision of the Joint Admission Board of JEE-201 0 regarding the eligibility of any applicant shall be final.

Physics Syllabus for IIT JEE

General: Units and dimensions, dimensional analysis; least count, significant figures; Methods of measurement and error analysis for physical quantities pertaining to the following experiments: Experiments based on using Vernier calipers and screw gauge (micrometer), Determination of g using simple pendulum, Young’s modulus by Searle’s method, Specific heat of a liquid using calorimeter, focal length of a concave mirror and a convex lens using u-v method, Speed of sound using resonance column, Verification of Ohm’s law using voltmeter and ammeter, and specific resistance of the material of a wire using meter bridge and post office box.
Mechanics: Kinematics in one and two dimensions (Cartesian coordinates only), projectiles; Uniform Circular motion; Relative velocity.
Newton’s laws of motion; Inertial and uniformly accelerated frames of reference; Static and dynamic friction; Kinetic and potential energy; Work and power; Conservation of linear momentum and mechanical energy.
Systems of particles; Centre of mass and its motion; Impulse; Elastic and inelastic collisions.
Law of gravitation; Gravitational potential and field; Acceleration due to gravity; Motion of planets and satellites in circular orbits; Escape velocity.
Rigid body, moment of inertia, parallel and perpendicular axes theorems, moment of inertia of uniform bodies with simple geometrical shapes; Angular momentum; Torque; Conservation of angular momentum; Dynamics of rigid bodies with fixed axis of rotation; Rolling without slipping of rings, cylinders and spheres; Equilibrium of rigid bodies; Collision of point masses with rigid bodies.
Linear and angular simple harmonic motions.
Hooke’s law, Young’s modulus.
Pressure in a fluid; Pascal’s law; Buoyancy; Surface energy and surface tension, capillary rise; Viscosity (Poiseuille’s equation excluded), Stoke’s law; Terminal velocity, Streamline flow, equation of continuity, Bernoulli’s theorem and its applications.
Wave motion (plane waves only), longitudinal and transverse waves, superposition of waves; Progressive and stationary waves; Vibration of strings and air columns;Resonance; Beats; Speed of sound in gases; Doppler effect (in sound).
Thermal physics: Thermal expansion of solids, liquids and gases; Calorimetry, latent heat; Heat conduction in one dimension; Elementary concepts of convection and radiation; Newton’s law of cooling; Ideal gas laws; Specific heats (Cv and Cp for monoatomic and diatomic gases); Isothermal and adiabatic processes, bulk modulus of gases; Equivalence of heat and work; First law of thermodynamics and its applications (only for ideal gases);  Blackbody radiation: absorptive and emissive powers; Kirchhoff’s law; Wien’s displacement law, Stefan’s law.
Electricity and magnetism: Coulomb’s law; Electric field and potential;  Electrical potential energy of a system of point charges and of electrical dipoles in a uniform electrostatic field; Electric field lines; Flux of electric field; Gauss’s law and its application in simple cases, such as, to find field due to infinitely long straight wire, uniformly charged infinite plane sheet and uniformly charged thin spherical shell.
Capacitance; Parallel plate capacitor with and without dielectrics; Capacitors in series and parallel; Energy stored in a capacitor.
Electric current; Ohm’s law; Series and parallel arrangements of resistances and cells; Kirchhoff’s laws and simple applications; Heating effect of current.
Biot–Savart’s law and Ampere’s law; Magnetic field near a current-carrying straight wire, along the axis of a circular coil and inside a long straight solenoid; Force on a moving charge and on a current-carrying wire in a uniform magnetic field.
Magnetic moment of a current loop; Effect of a uniform magnetic field on a current loop; Moving coil galvanometer, voltmeter, ammeter and their conversions.
Electromagnetic induction: Faraday’s law, Lenz’s law; Self and mutual inductance; RC, LR and LC circuits with d.c. and a.c. sources.
Optics: Rectilinear propagation of light; Reflection and refraction at plane and spherical surfaces; Total internal reflection; Deviation and dispersion of light by a prism; Thin lenses; Combinations of mirrors and thin lenses; Magnification.
Wave nature of light: Huygen’s principle, interference limited to Young’s double-slit experiment.
Modern physics: Atomic nucleus; Alpha, beta and gamma radiations; Law of radioactive decay;  Decay constant; Half-life and mean life; Binding energy and its calculation; Fission and fusion processes; Energy calculation in these processes.
Photoelectric effect; Bohr’s theory of hydrogen-like atoms; Characteristic and continuous X-rays, Moseley’s law; de Broglie wavelength of matter waves.

Ranking Procedure for IIT JEE 2010

Only those candidates who attempted both Paper-I and Paper-II will be considered for the ranking. Marks in Chemistry in JEE will be equal to marks in Chemistry section of Paper-I plus marks in Chemistry section of Paper-II. Similar procedure will be followed for Mathematics and Physics. The sum of the marks obtained in the individual subjects in JEE will be the aggregate mark for the candidate.
The average of the marks scored by all such candidates will be computed for each of the three subjects. These will be the Minimum Qualifying Marks for Ranking (MQMR) in the individual subjects.
Based on the MQMR in the individual subjects as well as the aggregate marks in the examination, a Common Merit List (CML) will be prepared without any relaxed criteria, such that the number of candidates in this list is equal to the total number of seats available in all the participating institutes put together. The aggregate marks scored by the last candidate in the CML will be the CML cut-off score (CCS).
Next, the merit list of the OBC candidates will be prepared. If the number of OBC candidates in the CML is equal to or more than 1.4 times the number of available OBC seats, then the OBC merit list will contain all these candidates.
In case the number of OBC candidates qualified in the CML is less than 1.4 times the number of available OBC seats, then relaxation (maximum of 10%) to the individual MQMR as well as to the CCS will be applied, and an OBC merit list will be prepared, in which the number of candidates will be at most 1.4 times the number of available OBC seats.
By applying 50% relaxation to the individual MQMR as well as to the CCS, separate merit list for SC, ST and PD candidates will be prepared. The number of candidates in each of these lists will be, at most 1.4 times the number of available seats in the respective categories.
While preparing the merit lists, if a candidate belongs to more than one category/ subcategory of relaxed norms, then he/she for the purpose of ranking shall be considered in all the categories in which he/she qualifies.
There will be no separate waiting list for candidates.

NBT with book festival society offers publishing course

Vijayawada: The Vijayawada Book Festival Society (VBFS) is organizing a two-week long course in Book Publishing from May 17 in association with the National Book Trust (NBT).The full time course is only open for candidates who have already worked in the publication industry and its fee is to be Rs.1...

Saturday, April 10, 2010

Civil Service's Personality Test on April 14, 2010

New Delhi: According to an official press release from the Ministry of Personnel, Public Grievances & Pensions, the candidates short-listed for the personality test for Civil Services (Main) Examination, 2009, will be taking the test on April 14, 2010 despite of the government declaring it a hol...

Friday, April 9, 2010

Cabinet approves proposal to grant financial aid to IMU

New Delhi: The Cabinet Committee on Economic Affairs today approved the proposal to provide financial support of Rs.282.25 crore to Indian Maritime University (IMU), Chennai to meet capital expenditure as well as recurring deficit. The IMU has been established as Central University with all India Ju...

Thursday, April 8, 2010

Class X CBSE Experiment - Convex Lens

Educational Games from

Top 10 most visited educational games

All Nobel Laureates in Physics

Click on the names to know more on the Nobel Laureates in Physics

Friday, April 2, 2010

UPSC to conduct NDA, Naval Academy Exam 2010 on April 18

New Delhi: The Union Public Service Commission (UPSC) will conduct the National Defence Academy (NDA) and Naval Academy Examination (I) 2010 at 745 venues located in 41 centres throughout the country on April 18, 2010 (Sunday).According to an official press release, "Admission certificates to candid...