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Very Important Portions for class 12 Physics for CBSE Board Exam 2017

Please revise these portions thoroughly

  • Electric Dipole : electric field due to a dipole on axial line and equatorial line, torque on a dipole in a uniform electric field, work done in rotating a dipole, potential energy of a dipole in a uniform electric field.
  • Gauss Theorem and applications
  • Metre bridge experiments, Potentiometer principle and experiments
  • Ampere’s circuit law and applications
  • MCG and conversion to ammeter and voltmeter
  • Cyclotron
  • LCR series circuit and resonance, expression for resonant frequency, Q factor, Power factor
  • Optical instruments (complete)
  • Theory of interference, Young’s double slit experiment, expression for fringe width, graph
  • LOGIC Gates (complete)
  • Electromagnetic spectrum, production and uses of em waves
  • Photo electric effect (compete: experimental setup for study of photoelectric effect, conclusions, Einstein’s equation and explanation to laws of PEE.)
  • BE per nucleon vs atomic mass graph and explanation to release of energy during nuclear fission and fusion.
  • CE transistor characteristics and CE transistor amplifier
  • Need for modulation
  • All block diagrams from “Communication”:
  • Total internal reflection and applications

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…)

BOARD QUESTIONS FROM WAVE OPTICS (CBSE/AISSCE)

Download the collection of questions asked in previous CBSE board exams from the chapter Wave Optics.

Practising the previously asked questions is a good idea to prepare for the exams.

Download (PDF, 607KB)

AISSCE 2016 Physics Question Paper feedback

How was the CBSE Physics exam?
When the question was asked to teachers and students the response was a mixed one.

Not as expected

Time was not enough
Question paper was lengthy
1 and 2 marks questions were easy
Five marks questions were confusing

Etc … were some of the reactions
How do you feel?
How was the paper?

Respond now. Your response counts. It will also help the teachers and Principal to take up the matter to CBSE authorities.

 

Feedback Received

Very Easy but Very Lengthy

“I appeared yesterday for the respective exam. It was quite surprising for us to see the very easy Physics Exam! I myself had prepared hard for it but the exam was much lengthy especially 3 marks questions. I myself couldn’t attempt 10 marks which i had already realized were quite easy questions. But I  have to accept this disappointment now” – Shubham Dhingra

Want to learn fast? Be SMART!

 

In this busy world everyone wants to save time. Being students, learning is our primary job. To save time, we need to learn faster. But how?

 

The first step is to have a SMART goal!

 

S – Specific

 

Time Management

 

M – Measurable

 

A –  Achievable

 

R – realistic

 

T – Time Bound

 

Having a Specific Measurable Achievable Realistic and Time Bound – SMART goal will increase your efficiency to grasp ideas faster.

 

While all of you may be having a long term goal, usually what you want to become after studies, you should have a short term goal, an objecting for every sitting of your studies too.

 

Have a Time Table – be specific what to study and when.

 

In the time slot for each, decide what and how much to study before you start. Know the outcome expected of you as a result of reading the portion. If it is not mentioned already, it is better to have a look at the questions based on the portion at hand before you actually read the topic.

 

Learn to read fast. Don’t go word by word while you read. Try to grasp a group of words at a go concentrating on the idea contained. Concentrate fully keeping in mind the objectives/ the questions you read based on the portion.

 

Do not reread or skip back until you have completed

 

After you have completed the reading check your comprehension by answering the questions.

 

Practice this daily and try to improve your reading and comprehension skills. This will certainly help you to score more as well as to live well in times to come.

 

 

 

Critical thinking – An essential trait for excellence in competitive exams

Nowadays, the number of students asking genuine doubts are found decreasing day by day. the main reason behind this is the lack of critical thinking. Think deeply on things you learn, hear and see. find answers to the questions arising in your mind. If you develop the habit of critical thinking, it is certainly help you to excel in exams. As we discussed earlier, “Questioning every answer is more important than answering every question”

How to develop critical thinking?

An easy way to develop the habit of critical thinking is by solving puzzles – Sudoku, crossword puzzles, tiles rearrangement, chess and the like. Try solving the logical reasoning type questions, picture based puzzles and reasoning ability tests etc. asked in various competitive exams.

The logical reasoning tests are helpful not only to excel in cometitive exams, but it will help you in moul;ding your personality also.

I personally advice reading all the works on Sherloke holmes by sir arthur Conan Doyale. the way sherloke holmes comes to various copnclusions will certainly inspoire us in being a keen observer and a critical thinker and more over a great problem solver.

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