Physics

This is a multiple choice answer as classified in NCERT Exemplar

(b) No frictional force exists in case of ideal fluid. Hence tangential forces are zero.

Yes, students can download the NCERT Exemplar PDF for Class 12 Physics Chapter 2. This offers various types of conceptual and application-based questions. Students can practice these offline at their own schedule. Practicing from PDF helps in improving problem-solving skills.

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.

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.

This is a short answer type question as classified in NCERT Exemplar

As ivory ball is more elastic than wet clay ball. So ivory ball tries to regain its original shape quickly, hence more energy and momentum transferred to ivory than clay ball. So ivory ball rises high

This is a short answer type question as classified in NCERT Exemplar

Length of steel cable l=9.1m

Radius r= 5mm= $5*{10}^{-3}$

Tension in the cable F =800N

Young's modulus of steel Y= 2 $*\frac{{10}^{11}N}{m^2}$

So $?l=\frac{F}{\pi r^2}*\frac{l}{Y}=\frac{800}{3.14*{(5*{10}^{-3})}^{-2}}*\frac{9.1}{2*{10}^{11}}=4.64*{10}^{-4}m$

This is a Multiple Choice Questions as classified in NCERT Exemplar

Answer-d

Explanation- for small objects  sizes less than 100 m centre of mass very close with the centre of gravity of the body. But when the size of object increases it weight changes and its CM and CG become far from each other.

This is a Multiple Choice Questions as classified in NCERT Exemplar

Answer-a, c

Explanation- a geostationary satellite is having same sense of rotation as that of earth i.e west east direction.

A polar satellite goes around earth's pole in north south direction.