Tiêu đề SAMPLE PAPER(2025) -14.pdf ✅

CBSE Physics Class 12 Sample Paper 14 Page 1 Sample Paper 14 Class XII 2024-25 Physics Time: 3 Hours Max. Marks: 70 General Instructions: 1. There are 33 questions in all. All questions are compulsory. 2. This question paper has five sections: Section A, Section B, Section C, Section D and Section E. 3. All the sections are compulsory. 4. Section A contains sixteen questions, twelve MCQ and four assertion reasoning based of 1 mark each, Section B contains five questions of 2 marks each, Section C contains seven questions of 3 marks each, Section D contains two case study based questions of 4 marks each and Section E contains three long questions of 5 marks each. 5. There is no overall choice. However, an internal choice has been provided in one question in Section B, one question in Section C, one question in each CBQ in Section D and all three questions in Section E. You have to attempt only one of the choices in such questions 6. Use of calculators is not allowed. 7. You may use the following values of physical constants where ever necessary i. c 3 10 m s/ 8 = # ii. me 9 1. k 10 g 31 = # − iii. e 1 6. C 10 19 = # − iv. μ 0 4 10 TmA 7 1 = π # − − v. h 6 6. J 3 10 s 34 = # − vi. ε 0 8.854 10 C N m 12 2 1 2 = # − − − vii. Avogadro’s number 6.023 1023 = # per gram mole SECTION-A 1. Which element is used in electric heater? (a) Copper (b) Platinum (c) Tungsten (d) Nichrome 2. S.I. unit of magnetic moment is (a) JT-2 (b) Am2 (c) JT (d) Am-1 3. Which of the following ratios is constant for an isolated conductor? (a) arg Potential Total ch e (b) arg Potential difference Ch e added (c) ( ) arg Potential Total ch e 2 (d) none of these 4. If the kinetic energy of an electron doubles, its de-Broglie’s wavelength changes by a factor (a) 2 (b) 2 (c) 2 1 (d) 2 1