NCERT

Preparing from the NCERT Exemplar Chapter 2 solutions will help in providing a strong concept foundation as it covers a wide range of question types from basic to advanced. If one practices the exemplar, they can score high in Board exams and entrance exams. However, it is advisable to first start from the NCERT textbook for the theory of the concepts and later on practice exemplars to boost the understanding and solve various types of questions based on these concepts. The exemplars are aligned with the CBSE syllabus and offer great study material for strengthening concept understanding and improving problem-solving accuracy.

NCERT Exemplar problems are designed by the subject matter experts. It helps in deepening conceptual understanding and improving the application skills of the students. Preparing the NCERT exemplar Chapter 2 helps students in mastering complex topics like capacitors, electric potential, and energy storage which are important for the board exam preparations and entrance tests like JEE and NEET.

No, Punjab Board does not directly follow NCERT books but rather a syllabus aligned with the NCERT model. While the curriculum is based on NCERT's structure, PSEB provides its own textbooks, which are the official study material for students. These PSEB textbooks cover all topics prescribed by the board for Class 10, 12 board exams.  

Chapter 1 Electric Charges and Fields NCERT Exemplar goes beyond the basic NCERT textbook and contains application-based and advanced-level questions. It is designed to enhance students' problem-solving skills, improve their understanding of electrostatics, and prepare them for their CBSE board exams and competitive exams like NEET and JEE.

NCERT books are very important for MPBSE 12th exams because most questions come from these books. They explain topics in a simple and clear way. Studying them properly helps you score better. Do not ignore the examples and exercises given at the end of each chapter. Always revise the NCERT content before trying other reference books.

No, the CISCE board does not require the use of NCERT books for ISC exams. While some ISC students may find NCERT books helpful for understanding concepts or preparing for entrance exams, the ISC curriculum has its own prescribed textbooks and doesn't mandate NCERT books as a requirement. 

To understand this, Assume you have a bucket that has infinite number of apples and if your mother asks "give me the apple". How will you figure out which one is "The Apple", she is asking for.

Similarly any inversre trigonometric functions behaves like a Many-one Function; which means,

For Example $\sin^ {-1}\left (\frac {2} {3}\right)$ can have many solutions, we need to fix one solutions which can be used as standerd value for the function.

• A standerd value (Angles) of any inverse trigonometric value lies between a fiexed range is known as principal value. 

For Ex; The value of $\sin^ {-1}\left (\frac {2} {3}\right)$ will always lie between –? /2 to? /2.

$y={\sin }^{?1}\left(\frac{2}{3}\right)?\sin \left(y\right)=\frac{2}{3}?y?[?\frac{?}{2},\frac{?}{2}]$  

NCERT textbooks for Classes 11 and 12 are crucial for CUET UG 2025, as they cover fundamental concepts and the exam's prescribed syllabus. However, to score well in the exam, students should also refer to additional books that offer advanced problems and varied practice exercises, especially for subjects like Physics and Chemistry.

Reference books like H.C. Verma's Concepts of Physics and OP Tandon's Organic Chemistry provide additional questions that help students practice for higher difficulty levels that might be covered in CUET Science paper.