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Welcome to the Wonderful World of Physics

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Dare ask questions! 

“Only those questions are foolish which are not asked”.

While learning Physics ‘questioning every answer is more important than answering every question’.

We created this website where the students can ask even the dumbest doubts without any fear.

There is no one to ridicule them.

We analyze the questions received here and try our level best to answer them satisfactorily with due explanations and illustrations.

Click on the Link Ask A Question to ask your doubts and questions.

It is a good Idea to search whether your question is already answered or not. SEARCH HERE 

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Physics Class XII Sample Papers

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CLASS XII
Physics Class XII Sample Paper 01 for 2016-17 along with Blue Print
https://kumarsir34.files.wordp ress.com/2017/01/physics-class -xii-sample-paper-01-for-2016- 17.pdf
Physics Class XII Sample Paper 02 for 2016-17 along with Blue Print
https://kumarsir34.files.wordp ress.com/2017/01/physics-class -xii-sample-paper-02-for-2016- 17.pdf
Physics Class XII Sample Paper 03 for 2016-17 along with Blue Print
https://kumarsir34.files.wordp ress.com/2017/01/physics-class -xii-sample-paper-03-for-2016- 17.pdf
Physics Class XII Sample Paper 04 for 2016-17 along with Blue Print
https://kumarsir34.files.wordp ress.com/2017/01/physics-class -xii-sample-paper-04-for-2016- 17.pdf
Physics Class XII Sample Paper 05 for 2016-17 along with Blue Print
https://kumarsir34.files.wordp ress.com/2017/01/physics-class -xii-sample-paper-05-for-2016- 17.pdf

Science Half Yearly Sample Question Papers for Class X

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Science Class X Half Yearly Exam Sample Paper 01
https://kumarsir34.files.wordp ress.com/2017/09/science-class -x-half-yearly-exam-sample- paper-01.pdf
Science Class X Half Yearly Exam Sample Paper 02
https://kumarsir34.files.wordp ress.com/2017/09/science-class -x-half-yearly-exam-sample- paper-02.pdf
Science Class X Half Yearly Exam Sample Paper 03
https://kumarsir34.files.wordp ress.com/2017/09/science-class -x-half-yearly-exam-sample- paper-03.pdf

Science Half Yearly Sample Question Papers for Class IX CBSE

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Science Class IX Half Yearly Exam Sample Paper 01
https://kumarsir34.files.wordp ress.com/2017/09/science-class -ix-half-yearly-exam-sample- paper-01.pdf
Science Class IX Half Yearly Exam Sample Paper 02
https://kumarsir34.files.wordp ress.com/2017/09/science-class -ix-half-yearly-exam-sample- paper-02.pdf
Science Class IX Half Yearly Exam Sample Paper 03
https://kumarsir34.files.wordp ress.com/2017/09/science-class -ix-half-yearly-exam-sample- paper-03.pdf

Magnetic effect(jee)

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An electron is shot into one end of a solenoid.as it enters the uniform magnetic field within the solenoid, its speed is 800m\sec and its velocity vector makes an angle of 30° with the central axis of the solenoid. The solenoid carries 4A current and has 8000 turns along its length. Find the revolutions made by the electron within the solenoid by the time it emerges from the solenoid’s opposite end.

Asked Shalini Roy

Relativistic travel and ageing

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Today’s doubt- If i am moving at constant speed of 0.5 times speed of light away from another person, it means both mine and his frame of reference are inertial (since both are not accelerated), then in my frame that person is moving away from me at 0.5 times speed of light and by special theory of relativity, he would be younger than me. But in his frame of reference I am going away and I should be younger. Actually who is getting younger and why?

Akshay Ramachandran asks

Rotation of a ball in mid air

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Hi, i’m working for a company where we use gyroscopes to measure the rotation of a ball in 3 dimensions. The output from the sensor is sent 25 times a second and is then converted to deg/s in each of the three axis’s. My task is to analyze the data and then create a program using it. I have some questions regarding this.


1. How do i find a good approximate of the total rotation of the ball in one number. The rotation change (not a lot but it makes things hard) in each of the axis’s while it’s airbourne, but when i use the following formula: sqrt((rotationX)^2 + (rotationY)^2 + (rotationZ)^2) i get almost zero total change of rotation. Is it correct, and why?

2. If i want to measure the total change of rotation between two consecutive samples, is it then correct to use this formula:
sqrt((rotationX.now-rotationX.last)^2 + (rotationY.now-rotationY.last)^2 + (rotationZ.now – rotationZ.last)^2). Why or why not?

Bonus: Does anyone know what or how the gyroscope measures?
Is it torque, just rotation in general or something else?

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  • Visualisation paradox of tension https://t.co/7z63FA5Zxk https://t.co/ftxQzoVMvP
    about 2 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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