Monthly Archive: March 2011

Mar 29

Investigatory Project reintroduced in CBSE Physics Curriculum

CBSE has reintroduced Investigatory Projects in Physics wef AISSCE 2013. This would be applicable for students who are in class XI during the academic year 2011 – 12 and writing

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Mar 16

Physics Tutors register now to get listed here!

We are starting a Physics Tutor section soon.

The Physics tutors all over India  (as well as those outside India) can now send their details along with a nominal fee for permanent listing with us.


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Mar 08

Class XI Physics Chapter wise Revision Test – Gravitation and Waves





Questions 1 to 5 carries one mark each

Questions 5 to 10 carries 2 marks each

Questions 10 to 15 carries 3 marks each

Questions 16

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Mar 08

Class XI Physics Revision Tests – Thermodynamics



Max marks 35

Time 1 ½ hrs

Questions 1 to 5: 1 mark  each

Questions 6 to 10: 2 marks each

Questions 11 to 15: 3 marks each

Question 16: 5 marks

  1. What is an isochoric process?
  2. On what factors does the efficiency of a Carnot engine depend?
  3. State second law of thermodynamics. (Any one statement)
  4. State zeroth law of thermodynamics.
  5. What is a heat engine?
  6. State first law of thermodynamics and apply it to an isothermal process.
  7. Explain why a balloon is cooler after it bursts.
  8. What is a PV diagram? What does the area between the PV curve and the volume axis signify?
  9. State the conditions for two bodies to be in thermal equilibrium.
  10. State Carnot’s theorem and explain its significance.
  11. What is a cyclic process? Show that the work done in a cyclic process is equal to the area enclosed by the loop representing the cyclic process.
  12. Why gases have two principal specific heat capacities? Define them
  13. Why C > Cv? Prove that C – Cv = R
  14. Define the coefficient of performance of a heat pump. (refrigerator) and obtain a relation for it in terms of temperature T1 and T2
  15. A sample of gas (γ = 1.5) is compressed adiabatically from a volume of 1600 cm3 to 400 cm3.  If the initial pressure is 150 kPa, what is the final pressure and how much work is done on the gas in the process?
  16. Explain the construction and various operations involved in a Carnot’s heat engine with neat labeled diagram. Draw Carnot’s cycle and write expression for efficiency of a Carnot’s heat engine.


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Mar 06

Now a site for PlusTwo Chemistry too …

How was the CBSE Chemistry Paper 2011 ? Click Here to respond
Visit for Free help in Chemistry.

The site is just started and aims at helping students up to plus Two to get free

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Mar 05

Physicist turns to arts – Prof. Walter Lewin

In the Video below, famous Physicist and teacher Professor Walter Lewin shares his personal insights on arts of 2oth century.


“At the turn of the century we’ve reached a point that beauty is no longer an issue. Now you may find some of these works beautiful, but the intention of the artists that you’ve just seen, was definitely not to paint something that was beautiful. They wanted to introduce a new way of looking at the world, and they did that in different ways.

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Mar 01

How was the CBSE PlusTwo Physics Question paper (AISSCE 2011)

Dear all students who wrote AISSCE Physics 2011,

How was the Physics Question paper?

Was it difficult? Very easy?

Were there questions out of syllabus?

Were there any errors?

Whatever be your opinion, post

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