MR. BM SHARMA WHO IS THE AUTHOR OF THE VERY POPULAR PHYSICS EXAM CRACK SERIES BOOKS BY CENGAGE LEARNING FOR IIT-JEE. MR. BM SHARMA IS A VERY POPULAR TEACHER OF PHYSICS BASED AT CHANDIGARH.HE HAS CREATED A VERY USEFUL VIDEO LECTURES SERIES USING HIS CLASSROOM RECORDING WHICH CA BE UTILIZED BY STUDENTS ALL OVER INDIA.HE HAS MENTIONED THOUSANDS OF STUDENTS WHO HAVE BECOME IITIANS AND GRADUATED FROM OTHER PRESTIGIOUS ENGINEERING COLLEGES.