How to learn physics derivation more easily

May anyone would like to suggest something so that I can get guidance?

The best way to arrive at any derivation relating to Physics is not to memorise the ultimate expression but you should know how it can be worked out step by step. You must be familiar with the usual notations of each terms and the units associated with each term.
A derivation is the logical progression from one line to the next until you achieve at the original expression with the mathematical work out.
When asked to do a proof in an examination, you should work out the proof from the scratch.
Physics is not about memorising facts and derivations. It is about the learning the basics so as to solve the problems. In examination, it is not the intention of the examiner to vomit up the information rather the examiner expects you to have the conceptual clarity while arriving at a formula.
To arrive at the particular expression,mouth need to have sound command of Mathematics such as Trigonometry, Algebra, Calculus etc so as to get the final expression.
Computation of the formula in Physics becomes difficult in case one is not proficient in Mathematics.

Physics is the study of properties and nature of the matter and energy. It is the fundamental subject of science and Mathematics and Chemistry complement to it nicely for assimilation of scientific knowledge. If one wants to learn science then it is imperative that one has to learn Physics and there is no other opinion on that. Some students feel that Physics and Mathematics are two tough subjects of Science and it is difficult to learn them. Actually this is a big mis conception in the minds of people. Learning science is a slow and gradual process and one has to start from the basic building blocks and then go to the higher derivations.

Physics is a subject where understanding of the process is necessary for absorbing the underlying principles. There are many help books and solved question papers which are available in the market but they would not be helpful if there is not a strong desire to learn the basic principles and techniques used in derivations. What I would advise is that a student should read and study from the elementary books and once the fundamental concepts are made clear then only attempt the derivations. What I mean to say is if someone is in class XII and is not getting the concept of a particular entity then go to the class VI or VII or VIII textbook where it was first introduced. One would find the simplest explanation there and with that one can then understand the advanced thing at hand. There is no short cut to understand the scientific derivations and theories. It is all hard work and continuous efforts that can bring the learning of those fundamental things. If one is not able to grasp the subject in the classroom then there are options of joining a good coaching centre for Physics where the tutor might give personalised attention to one and that could be helpful in learning. A good tutor is definitely a requisite source in such circumstance.

Let me explain the importance of underlying principles in understanding a Physics problem by taking up an example of electrical circuit. This is a simple electrical circuit consisting of a 12 Volt car battery and an electrical filament glass bulb which has a specification of 12 Volt 200 milli Ampere. It means that if I connect this bulb to the car battery then the bulb would glow and 200 milli Ampere current would flow through it. A car battery has two terminals one is known as +tive terminal and other is known as -ve terminal. Filament glass bulb has also two connection in it where we connect it to battery. Whichever way you connect it to battery, it would glow. It does not matter whether the current flows in one direction or reverse direction. This current heats the filament and it glows. One can also find out the electrical power consumed in this glowing of bulb by simply multiplying the voltage with current and that comes as 12 x 200 milli watt = 2.4 watt only (where 1 watt = 1 Volt x 1 Ampere). One can compare it with the 6 to 12 watt LED bulbs used in our houses so commonly. What if I want to glow one more bulb with this battery? Is it possible? Yes, just connect with wires another bulb to the battery terminals and it would also glow. What has happened? We have connected 2 bulbs to the same battery. Our car battery is very powerful. It is able to give glow to so many bulbs connected to it. Now change the configuration. Instead of connecting the two bulbs directly to the battery connect them in series and then connect to the battery. What has happened? The bulbs would glow very dimly and that shows that sufficient current is not flowing through the circuit. The battery is same but the electrical resistance has increased to two times of earlier ( R = R1 + R2 ) and so the current is accordingly reduced to the half that is almost to 100 milli Amperes. So the resistance of the circuit determines the current.

I have put this example for sake of understanding the subtleties of Physics as a subject. Can you find out how many things we have learned from this experiment. So simple, but giving us so much information on the underlying principles. Physics is full of such things and one has to study them in details. Every chapter would bring some new concepts and derivations with it. Understanding fundamentals would only help in the matter.

1. Practice makes a man perfect. So you should practice. Here practice is not that you mug up the formula. Read the formula. Then solve some examples using that formula. That will make you understand the formula and also you will remember the various items involved and their units. So go on solving some examples so that you will never forget the formula.
2. Don't mug up. Try to understand the logic behind the formula. Try to remember the formula in different ways.
3. Analyse the formula and understand how that formula has been derived. Never mug up. It is of no use.
4. Try writing them on some sticky papers and stick them in the places where your attention will go. That will make you remember them. Some people write in big letters on cards and keep them in some good places so that your attention will go there.
5. Be healthy. Sleep sufficiently. Keep the brain active. This will make you fit and your remembrance power will increase.