To get full details on important topics from top recommended books for Physics  check bekow:--

https://engineering.careers360.com/articles/crack-jee-main-2015-focus-more-on-important-topics

Heat, Thermodynamics, Optics , semiconductor, rotation motion, electrodynamics are some top topics with heavy weightage covering major part of paper.
Solvibg maximum numericals from above chapters will save your time from redundant topics which have comparitvly lesser weightage.

Some top preparation tips for smart planning and strategic devotion to topics as recommended by toppers shared below:-

https://www.google.co.in/amp/s/engineering.careers360.com/articles/jee-main-preparation-tips-for-physics%3famp

Goodluck, shall you need more help feel free to revert..!!

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