sir, i want to ask that if we solve many problems of a particular topic in physics then does it reduces our imagination towards nature? do we just become an engineer rather than a sceientist?do we loose our basic thinking process? please do answer.

Hey Mayank, firstly i would like to say, engineers also do thinking.   If you are solving many problems of a particular topic, then the thing is you have already thought of it in your mind. You dont need to do it again n again. You will automatically get its directions and nature of forces in your brain.  It doesnt mean you have lost your thinking process. And its also a necessary thing because it will only help you to gain up speed when you are actually writing JEE.