Advanced Physics for JEE Advanced, NSEP, INPhO and Physics Olympiad Aspirants. Learn concepts deeply through challenging problems and detailed solutions.
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One day in my class, I asked Taha, one of the toppers, to come to the board and solve a projectile motion problem. He read the problem carefully, thought for a few moments, and then did something interesting. Instead of immediately writing equations, he first drew a diagram. On the diagram, he marked all the quantities given in the problem and represented the physical situation as clearly as possible. Only after doing this did he begin writing equations and solving the problem. I asked the rest of the class to observe his approach carefully. Very quickly, they noticed something important: The diagram was at the heart of the solution. KEY IDEA Before solving a Physics problem, first draw the situation. A good diagram often reveals the path to the solution. Why Diagrams Matter There is a famous saying: A picture is worth a thousand words. In Physics, this statement is especially true. Many students try to solve problems directly from the text. As a result, they oft...
Most students believe that success in Physics comes from memorising formulas. Some believe it comes from solving hundreds of problems. Others think it is simply a matter of studying for long hours. My favourite teacher had a different opinion. He often used to say: “Less reading, more writing, most thinking.” As a student, I did not fully understand what he meant. However, as I became a serious student of Physics, the meaning of this simple statement became clearer and clearer. Today, after years of teaching Physics, I believe this is one of the most powerful pieces of advice a student can receive—not only for Physics but for learning any subject. The real secret lies in the last two words: Most Thinking. KEY IDEA Thinking is nothing but asking good questions to yourself. Before searching for a formula, a physicist first tries to understand the situation. He asks: What exactly is happening here? Can I visualise the situation? Which physical quantities are important? How are...
During my twenty years of teaching Physics, I have met countless students who say: "Sir, I know all the formulas, but I still cannot solve the problem." This raises an important question: If formulas are so important, why do students struggle even after memorising them? KEY IDEA Physics problems are not solved by memorising formulas. They are solved by understanding the physical situation and then choosing the appropriate mathematical tool. Physics Is Not Mathematics There is an important difference between Mathematics and Physics. In Mathematics, a problem is often solved by applying a known result, theorem, or formula. Once you recognise the pattern, the path to the solution becomes clear. Physics is different. A Physics problem first requires you to understand what is actually happening in the physical world. Only then can you decide which mathematical tool, formula, or method should be used. In other words, formulas do not solve Physics problems. People solve Ph...
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