Sorry my dear friends for not being able to post since last two months but there is an amazing news for all my friends who are appearing for boards this march and also for the JEE Mains aspirants for their next attempt. So friends from today onward I will help you all by posting really important concepts of the chapters of PCM that are there in the NCERT. How is it helpful for Jee Mains aspirants? See, these posts will also cover the topics that most of the JEE aspirants leave like Communication System (which is our today's topic), Bio molecules etc. And as you know that this year 40% of question in JEE Mains are directly from NCERT. I hope you understand what I wanted to say. So please guys just go through these points everyday for the next 30 days and you will be exam ready. Its just for making your present workload easy. If you have read a certain chapter then this will be like revision for you and for the first time learners this is a comprehensive note form of NCERT and that's what is important. Lets see you there ;)
SHM is a kind of periodic motion. We can say that all SHM's are periodic but all periodic motion are not SHM. Conditions for SHM: The acceleration of the body or the particle should be proportional to the negative of displacement. The total Mechanical Energy of the system remains conserved. There must be a state of stable equilibrium. Equation of SHM Consider a particle revolving around a circular path of radius ''a''. with a constant angular velocity ω. Let at time t=0, the particle is at the position A then the projection of the particle will be at the point B on the y-axis. So when the particle comes at the top the projection also comes at the top. Hence we can see that the particle is doing periodic motion but the projection is doing SHM. Hence the time period of the SHM is same as the time period of the circular particle. The derivation of the actual equation of the SHM is a bit complex and it is difficult for me to show it here so...
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