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Want to pass the CBSE Physics Exam? Here’s how !

Did you get very low marks in Physics and finding it too difficult to get pass marks?
Here is a systematic and easy to follow plan to succeed. Just believe me, you can get pass mark by following the instructions religiously.

1. Don’t leave a single question.

During the cool off time go through all the questions and decide the questions known well to you and mark them to attempt in the first round. Then have a look at the questions which may take some time to solve or of which you have some idea but the answer is not completely known. The rest of questions can be kept for third round where you will write an answer with the concepts known to you based on the hints which you may get from the question itself.

Attempting all questions is very important, because if you write an answer there is a chance to get some marks but if you do not write there is no chance of getting any mark for the question.

2. Practice the frequently asked portions

Please go through “MUST PRACTICE PORTIONS FOR CLASS XII” and practise the portions thoroughly.

3. Practice the Diagrams

You can find a list of important diagrams here shortly.

  1.  Electric field lines due to a points charge, a dipole, two negative charges, two positive charges etc.
  2. Electric field due to a dipole (axial position and equatorial position) diagram for derivation.
  3. Torque on a dipole in a uniform electric field
  4. Equipotential surfaces due to a point source, a line of charge and an electric dipole.
  5. Combination of resistors (in series and in parallel)
  6. Combination of cells. (diagram for derivation)
  7. Cyclotron
  8. Motional emf
  9. Mutual inductance of two solenoids
  10. AC generator
  11. AC circuit with R only
  12. AC circuit with L only
  13. AC circuit with C only
  14. LCR AC series circuit
  15. Impedance diagram
  16. LC oscillations
  17. Resonance in LCR series circuit
  18. Transformer
  19. Displacement current
  20. Ray diagram for image formation by Simple Microscope
  21. Ray diagram for image formation by Compound Microscope
  22. Ray diagram for image formation by Telescope in normal adjustment
  23. Ray diagram for image formation by Telescope when final image is at the least distance of distinct vision
  24. Prism formula
  25. Laws of reflection using Huygen’s wave theory
  26. Laws of reflection using Huygen’s wave theory
  27. Experimental arrangement for Young’s double slit experiment
  28. Expression for fringe width in Young’s double slit experiment
  29. Diffraction at a single slit
  30. Binding Energy per nucleon vs Mass number graph
  31. Distinction between conductors, insulators and semiconductors on the basis of energy band diagram.
  32. PN junction diode characteristics (circuit diagram and graph for forward bias and reverse bias)
  33. Half wave rectifier
  34. full wave rectifier
  35. zener diode as voltage regulator
  36. Transistor action
  37. Transistor characteristics in CE configuration (input characteristics and output characteristics)
  38. Transistor amplifier in CE configuration
  39. Download (PDF, 369KB)

  40. All Block diagrams from Communication (posted below)

    Download (PDF, 449KB)

(more…)

Resistance and Resistivity

Simran Asked

“Two wires A and B of equal lengths,different cross-sectional areas and made of same metal a)name the property which is same for both the wires. b)name the property which is different for both the wires”

Answer:

Since both the wires are of same metal, the resistivity will be same for both whereas since the dimensions (Area of cross section here) are different, the resistance will be different

Amateur Research

Ask Physics is looking for students from Kendriya Vidyalayas of Kerala who are interested in doing Research in any branch of Science.

If interested, Use the link below to express your interest.

You will be contacted by the concerned official.

Click Here to express your interest.

Optics

Rajat asked:

“when we exchange the lenses of compound microscope, then why it does not act as a telescope?”

Sequence of Learning Physics

In what sequence should these chapters be prepared for my exams:-
units and dimensions,kinematics,laws of motion,work power and energy,motion of system of particles and rigid body dynamics,gravitation.

Apoorv Katoch asked

Answer:

It is better to follow the same pattern as given in NCERT text book

Problem from Kinematics

The speed of a train changes from36km/h to 72km/h in 10sec. calculate the distance travelled during this time

Answer:

u=36km/h = 10 m/s

v=72 km/h=20 m/s

t=10 s

S=?

use v = u+ at to find a

a = 1 m/s2

Use v2-u2=2aS to find S

S = (400-100)/2 = 150 m

Now users at Ask Physics can add equations to their comments and questions.

Ask Physics has installed the Latex server and now users can type latex code to insert complex equations to their comments or questions.

If you are not familiar with latex code, use the following site to generate the code for the equation that you need.

http://www.codecogs.com/latex/eqneditor.php

When you visit the above site you can edit and view the result of the code generate. You have the option to copy the image of the equation or to copy the code itself (what you typed for getting the image equation; not the html code supplied) and paste the code in your comment.

Go, Try it Now!
(a+b)^{2}=a^{2}+b^{2}+2ab

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  • Visualisation paradox of tension https://t.co/7z63FA5Zxk https://t.co/ftxQzoVMvP
    about 3 weeks ago

Half Yearly Exam Count Down

Half Yearly Exam Count Down KVS Ernakulam RegionOctober 17, 2017
The Half Yearly Examination for Kendriya Vidyalayas of Kerala starts from 17 October 2017
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