Tuesday, November 29, 2011

CCE is more burden than earlier evaluation system

The newly introduced Continuous and Comprehensive Evaluation (CCE) by CBSE is more burburden for teachers as well as students. Instead of decreasing the load, it has increased it. The teachers are under more tension than the students, as they have to maintain more records and every time on full alert, monitoring, mentoring and all. Most of the evaluation taking place in most of the schools are unplanned or in some cases they do not take place at all.

The evidences of evaluation are often  "cooked" as and when required during school inspection or cross checking by CBSE. CBSE has highly formalised the formative evaluation and it is in practice defeating the purpose. The already overburdened teachers are further burdened by these. When it comes to supervision, the teachers are compelled to tell lies or produce false evidences and forged documents.

Why this injustice? What was wrong with the earlier system? NCF quotes that the earlier system was too much bookish and lacked a comprehensive approach.


But, why to overhaul the already existing system which has produced so many successful personalities some of whom have formulated the new system too.

Further, the teachers handling current class 11 are complaining that the stuff is extremely difficult to handle. The stuff means the students who passes with high grades in current system of evaluation in class X. They don't care what the teacher says, whether it be revising regularly, maintaining records or completing an assigned task in time.

As the students have not undergone a system of regular serious study under the shadow of CCE, the lack the fundamentals and still expect that it will be an easy cake walk and that they can score high marks without studying anything.

It is clear that the current CCE and its implementation has to be revised. Let the academic side be given prime importance and let the assignments and projects continue to be a part of the evaluation and be counted for promotion as was the case in Kendriya Vidyalayas.

The term Continuous and Comprehensive Evaluation and the rigidity imposed by CBSE in the time frame and assessment plans and all defeats the purpose in most of the cases.

Opinions and further suggestions are invited from all.

CCE looks fantastic when looked from out side or in theory, but in practice, it flopped.

What do you think? Post your reactions and reflections as comments to this post.


CTET–How to prepare?

Centre Teacher Eligibility Test (CTET) is ahead and it’s a common question asked by many – How to prepare for it?

Here are some suggestions to score well in CTET

  • Revise your notes on Education, Educational Psychology, Educational Technology, Educational Sociology, History of education, Philosophy of Education
  • Read newspaper regularly with focus on educational issues.
  • Be thorough the NCF (National curriculum framework) and read all the policy papers.
  • Visit NCERT website & education.nic.in and many of the policy papers are available for download.
  • Refresh your general knowledge, elementary mathematics and popular science.
  • Read the science textbooks of 8,9 and 10 and in case if you have any doubts on these please ask at www.askphysics.com


Have confidence, prepare well and perform well, success will be yours

Great Physicists - A SlideShow

Saturday, November 26, 2011

CBSE 12 (AISSCE) Revise Physics Well with online study materials or Download and learn at your own pace

Excellent online study materials for class 12  students in  Physics. Use them to learn online or download them and read and learn at your own pace.

The materials are prepared by experts in the field and can be used for first time study or  for a quick revision.

Have a doubt? Ask your doubts and questions using the contact form above.

Friday, November 25, 2011

CBSE Physics Published set of sure shot questions from AISSCE 2012

CBSE Physics (http://physics.2lv.in) published a set of must practice questions. It is claimed that anyone who practises answers to these questions well will be able to score more than 60% with ease. This can be considered as a bare minimum package as these questions are based on the minimum expected learning outcome from any student of class XII with Physics as one of the subjects.

Find below the direct link to the post


The solutions to the questions are not yet published but the site assures to publish the solutions too in due course. However, it would be a good practice to solve the questions yourselves and show the answers to your teachers for correction.

Solved questions emailed to PLUSTWOPHYSICS can be evaluated and the response can be sent. You can use the contact us page to upload your solutions. The solutions can be in word format or in scanned form after writing. If sending in scanned form you may have to send it one page at a time or all pages together in a zipped format. The answers will be evaluated as per CBSE’s guidelines followed during evaluation.

Wednesday, November 23, 2011

Which way is better for giving AIEEE exam? ONLINE or OFFLINE.

Which way is better for giving AIEEE exam? ONLINE or OFFLINE.

-Yash asked -


I would personally recommend online. But the choice is up to you.

Please follow the following check to decide. Try to identify for yourself the plus points and negative points of writing AIEEE online and OFFLINE.

The most important disadvantage of choosing the OFFLINE version is the rarity of choices. You may have to travel long if you are not nearby the centre.

The decision is yours. But, think well before you decide.

Thursday, November 17, 2011

Awareness Programme on ‘IPR for Inventions and Creations’

Awareness Programme on ‘IPR for Inventions and Creations

Jointly Organized by PIC-Kerala/ KSCSTE & KendriyaVidyalaya, Pattom, Trivandrum

on 19th November, 2011

Venue: Resource Room KendriyaVidyalaya, Pattom


Programme Schedule 19-11-2011

09.00 am – 09.30 amRegistration
09.30 am – 10.00 amInaugural Session
10.00 am – 11.00 amKeynote Address

Dr. AchuthSankar S. Nair

Director, Centre for Bioinformatics &Co-ordinator,

IPR Cell, University of Kerala,

Kariavattom, Trivandrum.
11.00 am – 11.15 amTea Break
11.15 am – 12.30 pmTechnical Session

‘IPR – Tool to protect inventions and creations’

Shri. V.P. Balagangadharan

Brahmaprakash Scientist,

VSSC, Thiruvananthapuram
12.30 pm – 01.00 pmIPR Quiz Competition & Concluding Session

Dr. Achuthsankar S. Nair

Dr. Achuthsankar S. Nair heads the State Inter University Centre of Excellence in Bioinformatics, University of Kerala.  He had his BTech (Electrical Engineering) from College of Engineering, Thiruvananthapuram and MTech (Electrical Engineering) from IIT Bombay. He also holds an M.Phil in Computer Speech and Language Processing from the Dept of Engineering, University of Cambridge, UK and PhD from University of Kerala.

Since 1987, he has taught in various Engineering Colleges, Universities and Institutes both within India and abroad. During 2001 – 2004 he served as Director of Centre for Development of Imaging Technology, C-DIT, an autonomous techno-creative centre of Govt. of Kerala. In 2006 he was a Visiting Professor in University of Korea, Seoul.

He has authored 10 popular-science books on IT in Malayalam, including one on the internet in 1996 and one on Free software in 2002. His current research interests include use of digital signal processing (DSP) in bio-sequence analysis. He has a modest number of research publications in International & Indian Journals. One of his contributions on electro-mechanical model for the Transistor is cited in the classic text book: Hughes's Electrical Technology (7th Edition) published by Orient Longman, UK.

He has widely traveled and given talks in hundreds of venues including Universities, a very large number of colleges in Keralam, University of Madras, Indore University, Bharathi Dasan University, Jawaharlal Nehru University, National University of Juridical Sciences, Culcutta and the Madras Music Academy.

He is recipient of Young Scientist Award of Govt. of Kerala (1991), Cambridge Barclay Scholarship (1991), ISTE National Award for Young Engineering Teachers (1994). He is a member of Computer Society of India, IEEE, Indian Society for Technical Education, and International Society for Computational Biology. He is currently a member of the Executive Committee of State Higher Education Council of Govt. of Kerala



Shri. V.P. Balagangadharan is the Brahmaprakash Scientist in VSSC. He is the link between the centre and ANTRIX Corporation, Bangalore.

In his capacity, Shri. V P Balagangadharan is responsible for all intellectual property related matters of the centre. He has facilitated more than 60 patents and about a dozen copyright and a few designs.

ShriBalagangadharan has undergone many training programmes in IPR, has taken the DL-01 course on IPR by World Intellectual Property Organisation, has given many invited lectures (nearly 50) on IPR and conducted classes for many IPR awareness programmes. He has also conducted Induction programs on IPR to students. He has facilitated filing of 40 patents and 20 technology transfers to industry. He is also a member of the ISRO level standing Committee on IPR.

He was born in 1950 in Payyanur. Postgraduated in Chemistry and Joined VSSC in 1972. He possess 27 years of expertise in analytical chemistry at VSSC. He is an Expert in material characterization and published 30 papers in international journals and seminars.

Apart from his professional expertise, he is well known for his science communication through articles, lectures, radio and TV. He is a member, fellow and office bearer of many professional bodies.

He has been closely associated with KSCSTE. He is a member of IPR Advisory Committee, member of State Level IPR Standing Committee and chairs similar IPR related Committee.

Mirror Mirror Relativity

Can you see your image when you are travelling at the speed of light?

Visitors and students are requested to respond and answer via comments.

Einstein’s Theory of relativity says:”The Laws of Physics are the same in any Inertial Frame of Reference.”

Wednesday, November 16, 2011


CBSE will be conducting the Eleventh All India Engineering/Architecture Entrance Examination (AIEEE), Offline Examination on 29th April, 2012 (Sunday) and Online Examination for B.E./.B.Tech. only from 7th May to 26th May, 2012 for admission to degree level courses in Engineering and Architecture in National Institute of Technologies (NITs), Indian Institute of Information Technologies (IIITs), Centrally funded Institutions, Deemed Universities and Institutions in States/UTs (Other than those covered by Joint Entrance Examination) State Level Entrance Examination.

1. Subject Combination and Mode of Examination

Paper 1
Physics, Chemistry & Mathematics


Objective type questions with equal weightage to Physics, Chemistry & Mathematics



Paper 2
Mathematics – Part I (Objective type questions)
Aptitude Test – Part II (Objective type questions)
& Drawing Test – Part III (questions to test Drawing Aptitude OFFLINE ONLY)

2. Schedule of Examination
will be conducted as per schedule given below:
A. Pen & Paper (Offline examination)

0930-1230 Hours (3 Hours)

Paper 1

Physics, Chemistry & Mathematics

1400-1700 Hours (3 Hours)
Paper 2
Mathematics – Part I
Aptitude Test – Part II &
Drawing Test – Part III
B. On line examination for B.E. /B.Tech only (Computer base testing)
7-05-2012 to 26.05.2012
1st shift (9.00 am to 12.00 noon) 2nd shift (2.00 pm to 5.00 pm) 3 Hours

Paper 1
Physics, Chemistry & Mathematics

Tuesday, November 15, 2011

Does gravity travel instantaneously?

Does gravity travels instantaneously? Or it travels equal to the speed of light.


No clear answer now. If we believe in the Theory of relativity, Gravity (Gravitational Waves travel with the same speed as that of light in vacuum. If gravitons are like photons, then it makes sense too.

However I invite you to think more and post your thoughts as comments here. Let the discussion begin.

I found the following links to know more

  • http://metaresearch.org/cosmology/speed_of_gravity.asp

  • http://en.wikipedia.org/wiki/Speed_of_gravity

  • http://www.desy.de/user/projects/Physics/Relativity/GR/grav_speed.html

Numerical Problems From Optics

  1. When an object of height 4cm is placed at 40cm from a mirror the mirror forms the image on the object itself. If the height of the image is equal to the height of the object. Find out the focal length of the mirror and identify the mirror.

  2. A convergent beam of light passes through a diverging lens of focal length 0.2m and comes to focus at distance 0.3m behind the lens.Find the position of the point at which the beam would converge in the absence of lens?



Sample Paper

Time allowed : 3 hours

Max. Marks : 70

General Instructions:

  1. All questions are compulsory

  2. There are 30 questions in total. Questions 1 to 8 carry one mark each, 9 to 18 carry two marks each, 19 to 27 carry 3 marks each and 28 to 30 carry 5 marks each.

  3. There is no overall choice, but internal choices are provided. You have to attempt only one choice in full.

  4. Use of calculator is not permitted.

  5. You may use the logarithm table, if required.

1. What is electrostatic shielding?

2. Identify the carbon resistor whose colour code is green, blue, red and gold.

3. Energy of a charged particle moving in a magnetic field does not change. Why?




Time allowed : 3 hours

Max. Marks : 70

General Instructions:

  1. All questions are compulsory

  2. There are 30 questions in total. Questions 1 to 8 carry one mark each, 9 to 18 carry two marks each, 19 to 27 carry 3 marks each and 28 to 30 carry 5 marks each.

  3. There is no overall choice, but internal choices are provided. You have to attempt only one choice in full.

  4. Use of calculator is not permitted.

  5. You may use the logarithm table, if required.


1. Express dielectric constant in terms of capacitance.

2. What is magnetic susceptibility?

3. Define electromagnetic induction.

Monday, November 14, 2011

is all physics which we had studied in class 11 and 12 are correct?

Is all physics which we had studied in class 11 and 12 are correct or ... ?


I would like to quote just one thing, "Science tells the first word of everything and the last word of nothing"

What we learnt yesterday might have changed today and may change in future. We have to adapt ourselves to the new findings, discoveries and inventions.

Further, What we learn in class XI and XII is up to that level and we when we go to higher levels, we learn things more deeply and many things will be dealt differently.

Wednesday, November 9, 2011

Speed of sound

Why sound travels faster in humid air than normal air as humid air is denser than normal air? (Akash asked)


The speed of sound in a medium is inversely proportional to the square root of its density. Humid air is less dense than dry air. Therefore the speed of sounf in humid air is greater than that in dry air.


Are you thinking why dry air is more than that of humid air? This is a common misconception. Students used to think that humid air is denser than dry air. But it is not so. Just like skimmed milk (milk removed off its cream) is more dense than normal milk (with cream). Density of cream is much less than that of the rest of milk. So when it is removed, the residual milk becomes denser.

Humid air contains water vapor content. Water vapor is lighter than air. So when air contains water vapor, its density is less. When the water content is removed, it becomes denser.
For more details refer:

Tuesday, November 8, 2011

Class IX Summative Assessment 1 Science Sample Paper

Download Sample Paper for Class IX Science Summative Assessment 1

Class IX Science Summative Assessment 1
IX Science Question Paper Summative Assessment 1

What is present in between the atoms of gases?

What is present in between the atoms of gases?

(Aniket Mukherjee asks)

Answer: Nothing. Vacuum

Sunday, November 6, 2011

Download sample question papers from CBSE


Sample Question Paper for Class IX & X for Term II (Second Term - March 2012)
Sample Question Paper, Syllabus and Guidelines for Class IX & X for Term I (First Term - Setember 2011)
Sample Question Paper for Class IX & X for Term II (Second Term - March 2011)
Sample Question Paper for Class IX & X for Term I (First Term, September 2010)
Sample Question Paper for Board Exam 2012 (Class XII)
Sample QP & Marking Schemes for Board Exam 2011 (Class XII)
Previous Year Question Papers 2011 and Marking Scheme
Previous Year Question Papers (2010) and Marking Scheme

If gravitation suddenly stops?!

If gravitation suddenly stops …… neglecting the rotation … if someone is standing on ground ….. will the normal reaction disappear?? If yes why? I want to know when does normal reaction acts on a body? and in the absence of weight why would it disappear?

(Ahwan Abhinandan Joshi asks)

A problem from Optics

A convergent beam of light passes through a diverging lens of focal length 0.2m and comes to focus at distance 0.3m behind the lens.Find the position of the point at which the beam would converge in the absence of lens?

Wednesday, November 2, 2011

What would happen if the Earth stopped rotating?

The speed of an object on earth's surface near equator is approximately is 1670 kilometers/hour. So, if the earth stops rotating suddenly,  the objects on the surface of earth which are unbound will be thrown eastwards tangentially with the speed of rotation of earth.

Read more at: