Posts Tagged ‘CBSE’

Random collection of Physics Viva Questions

1. State the Principle of a potentiometer. (The students say that potential drop is proportional to length but the constant quantities are not mentioned)
2. How can we increase the sensitivity of a potentiometer?
3. Define figure of merit of a galvanometer.
4. Which has more resistance – a galvanometer or a milliammeter?
5. How does an LED emit light?
6. What is the difference between an ordinary diode and an LED?
7. Define principal axis of a convex lens?
8. What happens to the focal length of a concave mirror if it is immersed in water?
9. What are the factors affecting the internal resistance of a cell?
10. What are the difference between primary and secondary cell?
11. Why can’t we use a dry cell for starting a car?
12. What happens to the resistivity of a wire when it is doublefolded?
13. How does the resistance of a wire depend on its dimensions?
14. Why are the resistances used in a resistance box is like 1,2,2,5,10,20,20,50,100,200,200,500,1000,2000,2000,5000 etc?
15. Why constantan or manganin wires are used for making the resistance coils in resistance box?
16. What is a standard resistance?
17. What are the characteristics of a standard resistance?
18. What are the precautions to be observed while doing electricity experiments in general?
19. What is a galvanometer?
20. What is the resistance of an ideal ammeter?
21. Why is ammeter always connected in series and voltmeter always connected in parallel?
22. How can we convert a galvanometer into an ammeter or a voltmeter?
23. What is shunt?
24. What is AVO meter?
25. What is the effect of temperature on the resistance of a conductor?
26. Why does the resistance of a conductor increases with temperature, whereas that of a semiconductor decreases with temperature.
27. What is conductance?
28. What are non ohmic devices? give an example.
29. What are superconductors?
30. Define emf
31. Why emf is said to be a misnomer?
32. What happens if the battery used in the primary circuit of a potentiometer has less emf compared to the emf of the cell used in the secondary circuit?
33. If you find that the galvanometer reading is shaky, what error can you expect?
34. What do you mean by figure of merit of a galvanometer?
35. Why a moving coil galvanometer is called so?
36. What is the principle of a galvanometer?

PHYSICS QUESTION PAPERS

Find below the links to questions papers in Physics already available at our group of Physics websites

http://physics.2lv.in/must-practice-questions-for-cbse-physics-class-12-solved/

http://plustwophysics.com/how-was-the-cbse-plustwo-physics-question-paper-aissce-2011/

http://plustwophysics.com/kerala-plus-two-physics-sample-question-paper/

http://plustwophysics.com/kvs-chennai-region-physics-preboard-ii-question-paper/

http://plustwophysics.com/third-term-unit-test-sample-question-paper-for-class-xi-cbse/

http://plustwophysics.com/cbse-previous-question-papers-with-answers-and-marking-scheme/

http://plustwophysics.com/icse-physics-question-paper/

http://plustwophysics.com/download-aissce-2011-sample-papers-for-class-xii-cbse/

http://plustwophysics.com/xii-physics-model-question-papers-from-various-boards/

http://physics.2lv.in/latest-cbse-question-paper-in-science-for-class-ix-summative-assessment/

http://physics.2lv.in/nsep-2010-question-paper-and-solutions/

http://physics.2lv.in/a-too-simple-question-paper-from-physics-magnetic-effects-of-current-and-magnetism-for-class-xii/

http://physics.2lv.in/previous-question-papers-cbse-question-paper-2007-class-xii-physics/

http://physics.2lv.in/cbse-xii-aissce-2006-physics-question-paper/

http://physics.2lv.in/sample-question-papers-syllabus-and-guidelines-for-class-ix-and-x-for-term-i-first-term-september2011/

http://physics.2lv.in/selected-physics-questions-for-sa1-for-class-9/

http://physics.2lv.in/viva-voce-questions-from-ohms-law-metre-bridge-potentiometer-galvanometer-and-other-experiments-from-electricity-and-magnetism/

http://123myblog.com/2lv/physics/blog/node/385

SUMMATIVE ASSESSMENT 1 FOR CBSE CLASS 9 (GRAVITATION)

Find below a question bank from the chapter GRAVITATION of class 9. Portions up to the syllabus for Summative assessment 1 only is included. The answers are not published herewith. Students are advised to solve the questions and problems and post the q...

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Relative position of a helicopter

If a helicopter takes off from a point on earth.(at certain altitude) and its still at that point in air.After certain time interval the observer whose position was same as that of helicopter’s take off point will see the helicopter right above him. The question arises is that how it is possible if [...]

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Pseudo force and solving problems

Sir,can we solve problem without considering pseudo forces in non inertial frame?(give an example) Incoming search terms:QUESTINS FOR PROPERTIES OF MATTERoverloading physicsa stary nightsample paper of 10 class sa 1resultant force due to magnetic effectscience sample paper for class 2011 sa1sample question for cbse class ix sa1star and nightmagnetic forces onlyfree download of cbse based social [...]

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A Numerical from Combination of thin lenses in contact

Two thin lenses of focal lengths f1=20cm and f2=60cm are placed in contact. find the focal length f3 of the combined lenses. find also the focal length f of a third lens placed in contact with these two that would result in overall focal length f11=-40cm. (Asked Young) Incoming search terms:class 9 science sample paper for [...]

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CBSE Class X Results 2011

CBSE will be announcing the Class X results 2011 probably on Tuesday, 31 May 2011, in case it is not able to declare results by 3 pm on Monday, 30 May 2011.

The results will be available at http://cbseresults.nic.in/