In this post, we will be discussing the importance of Gravitation as a topic for preparation of JEE Advanced and JEE Mains.
Observing the question papers of the last few years, it was found that the number of questions that appear from Gravitation are less when compared to other major topics, with 1 question being asked in the previous 4 years in both JEE Advanced and JEE Mains.
Though the number of questions is less, the difficulty level of questions is relatively less, and hence gravitation can fetch you marks, and is a safe choice. Its analogy to electrostatics helps in solving questions which contain concepts of either of them.
The Important parts of the chapter shall be discussed next.
Generally, the questions that appear out of gravitation are linked to some other chapters and concepts at the same time, like Error and Dimensional Analysis, and Electrostatics, mostly in the mix and match type of questions, and assertion reason type.
So for optimum preparation, a strong hold on the very basic concepts and formulas like the gravitational force !!F=sqrt((GM_eM)/r^2)!! And escape velocity !!V_(es) =
sqrt((2GM)/R)!! goes a long way. Most of the questions that were asked purely out of Gravitation were related to escape velocities of various bodies and their comparison.
Another part of certain importance is the gravitational field values on the inside and outside of a point in a spherical or cylindrical body, questions related to which have been asked in the past.
All in all, gravitation is a topic which gives sure-shot marks once an understanding has been developed.