New Era Physics Class 11 Part-I is a comprehensive physics textbook published by G.R. Bathla & Sons and authored by Surindra Lal, designed for CBSE/NCERT-aligned Class 11 curriculum. It covers the foundational portion of the Class 11 physics syllabus in a clear and systematic manner with detailed theory explanations, solved examples, practice exercises, and topic-based problems tailored to build strong conceptual understanding and problem-solving skills. The book emphasizes problem-solving strategies, numerical questions, and higher-order thinking skill (HOTS) practice, making it suitable for school exams as well as preparation for competitive tests.