NCERT Class 12 Physics Solutions: Students of Class 12 can refer to this article to get NCERT Solutions for Class 12 Physics Chapter 13. These solutions will be helpful in understanding Chapter 13 Nuclei. The NCERT Solutions for Class 12 Chapter 13 Nuclei will include all unsolved theories and numerical problems. Read to get NCERT solutions for Class 12 Physics, Chapter 13 all exercises.
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Get, detailed solutions to the questions of the chapter Nuclei from NCERT textbook Class 12 Physics. The objective is to helping students regarding the pattern of answering the question as per the cbse latest marking scheme. Check the NCERT Class 12 Physics Nuclei solutions below.
Nuclei Solutions
Some questions of this chapter are given here.
Q. Obtain the binding energy (in MeV) of a nitrogen nucleus (14 )7N,
given m (14 )7N =14.00307 u
Answer
Binding energy of 7N14 = ΔMc2
Mass defect = [mass of 7 protons + mass of 7 neutrons – actual mass of N]
= [14.11543 – 14.00307]
= 0.11236 u
Binding energy = 0.11236 u x 931.5 MeV / u
= 104.66 MeV
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Q. A given coin has a mass of 3.0 g. Calculate the nuclear energy that would be required to separate all the neutrons and protons from each other. For simplicity assume that the coin is entirely made of 63 29Cu atoms (of mass 62.92960 u).
Answer
Given:
Mass of coin = 0.003 kg
Mass of 29Cu63 = 62.9296 u
= 1.045261 x 10-25 kg
No. of Cu atoms in given sample
D = 0.003 / 1.045261 x 10-25
= 2.8701 x 1022 atoms
Mass defect of 1 Cu atom = 0.591935
BE of 1 Cu atom = 0.591935 x 931.5 = 551.387 MeV
So,
BE of D atoms = 2.8701 x 1022 x 551.387
= 1.583 x 1025 MeV
= 2.53 x 1012 J
NCERT Rationalised Content Chapter: Nuclei
| Chapter Name |
Page No. |
Deleted Topics |
| Chapter 13: Nuclei |
446–451 |
13.6.1 Law of Radioactive Decay 13.6.2 Alpha Decay 13.6.3 Beta Decay 13.6.4 Gamma Decay |
| 452–455 |
13.7.2 Nuclear Reactor |
|
| 462–466 |
Exercises 13.1, 13.2, 13.6–13.10, 13.12–13.14, 13.18, 13.22–13.31 |
|
CBSE Class 12 Physics Updated Question Paper Design 2023-24
| Typology of Questions |
Total Marks |
Approximate % |
| Remembering: Exhibit memory of previously learned material by recalling facts, terms, basic concepts, and answers. Understanding: Demonstrate understanding of facts and ideas by organising, comparing, translating, interpreting, giving descriptions, and stating main ideas. |
27 |
38 |
| Applying: Solve problems to new situations by applying acquired knowledge, facts, techniques and rules in a different way. |
22 |
32 |
| Analysing: Examine and break information into parts by identifying motives or causes. Make inferences and find evidence to support generalisations. Evaluating: Present and defend opinions by making judgments about information, validity of ideas, or quality of work based on a set of criteria. Creating: Compile information together in a different way by combining elements in a new pattern or proposing alternative solutions. |
21 |
30 |
| Total |
70 |
100 |
| Practical |
30 |
|
| Gross Total |
100 |
|
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