class 12 physics chapter 1 case study questions

• Electric Charges and Fields Class 12 Case Study Questions Physics Chapter 1

Last Updated on September 4, 2024 by XAM CONTENT

Hello students, we are providing case study questions for class 12 physics. Case study questions are the new question format that is introduced in CBSE board. The resources for case study questions are very less. So, to help students we have created chapterwise case study questions for class 12 physics. In this article, you will find case study questions for cbse class 12 physics chapter 1 Electric Charges and Fields.

Table of Contents

Case Study Questions on Electric Charges and Fields

Question 1:

Surface charge density is defined as charge per unit surface area of surface charge distribution. i.e., $\sigma=\frac{d q}{d s}$. Two large, thin metal plates are parallel and close to each other. On their inner faces, the plates have surface charge densities of opposite signs having magnitude of $17.0 \times 10^{-22} \mathrm{Cm}^{-2}$ as shown. The intensity of electric field at a point is $E=\frac{\sigma}{\varepsilon_0}$, where $\varepsilon_0=$ permittivity of free space.

(i) $E$ in the outer region of the first plate is (a) $17 \times 10^{-22} \mathrm{~N} / \mathrm{C}$ (b) $1.5 \times 10^{-25} \mathrm{~N} / \mathrm{C}$ (c) $1.9 \times 10^{-10} \mathrm{~N} / \mathrm{C}$ (d) zero (ii) $E$ in the outer region of the second plate is (a) $17 \times 10^{-22} \mathrm{~N} / \mathrm{C}$ (b) $1.5 \times 10^{-15} \mathrm{~N} / \mathrm{C}$ (c) $1.9 \times 10^{-10} \mathrm{~N} / \mathrm{C}$ (d) zero (iii) $E$ between the plates is (a) $17 \times 10^{-22} \mathrm{~N} / \mathrm{C}$ (b) $1.5 \times 10^{-15} \mathrm{~N} / \mathrm{C}$ (c) $1.9 \times 10^{-10} \mathrm{~N} / \mathrm{C}$ (d) zero (iv) The ratio of $E$ from right side of $B$ at distances 2 cm and 4 cm , respectively is (a) $1: 2$ (b) $2: 1$ (c) $1: 1$ (d) $1: \sqrt{2}$ (v) In order to estimate the electric field due to a thin finite plane metal plate, the Gaussian surface considered is (a) spherical (b) cylindrical (c) straight line (d) none of these

(i) Option (d) is correct.

There are two plates $A$ and $B$ having surface charge densities,

$$ \sigma_A=17.0 \times 10^{-22} \mathrm{C} / \mathrm{m}^2 $$

on $A$ and $\sigma_B=-17.0 \times 10^{-22} \mathrm{C} / \mathrm{m}^2$ on $B$, respectively. According to Gauss’ theorem, if the plates have same surface charge density but having opposite signs, then the electric field in region I is zero.

$$ E_{\mathrm{I}}=E_A+E_B=\frac{\sigma}{2 \varepsilon_0}+\left(-\frac{\sigma}{2 \varepsilon_0}\right)=0 $$

(ii) (d): The electric field in region III is also zero.

$$ E_{\mathrm{III}}=E_A+E_B=\frac{\sigma}{2 \varepsilon_0}+\left(-\frac{\sigma}{2 \varepsilon_0}\right)=0 $$

(iii) (c): In region II or between the plates, the electric field

$$ \begin{aligned} & E_{\mathrm{II}}=E_A-E_B=\frac{\sigma}{2 \varepsilon_0}+\frac{\sigma}{2 \varepsilon_0} \\ &=\frac{\sigma\left(\sigma_A \text { or } \sigma_B\right)}{\varepsilon_0}=\frac{17.0 \times 10^{-22}}{8.85 \times 10^{-12}} \\ & E=1.9 \times 10^{-10} \mathrm{NC}^{-1} \end{aligned} $$

(iv) (c): Since, electric field due to an infinite-plane sheet of charge does not depend on the distance of observation point from the plane sheet of charge. So, for the given distances, the ratio of $E$ will be $1: 1$. (v) (b): In order to estimate the electric field due to a thin finite plane metal plate, we take a cylindrical cross-sectional area $A$ and length $2 r$ as the gaussian surface.

Case study questions for other chapters of class 12 physics is given below.

Case Study Questions for Class 12 Physics

We hope the given case study questions for Electric Charges and Fields Class 12 helps you in your learning.

Topics from which case study questions may be asked

• Electric charges
• Conservation of charge
• Coulomb’s law – force between two-point charges
• Forces between multiple charges
• Superposition principle
• Continuous charge distribution
• Electric field
• Electric field due to a point charge
• Electric field lines
• Electric dipole
• Electric field due to a dipole
• Torque on a dipole in a uniform electric field
• Electric flux
• Statement of Gauss’s theorem
• Applications of Gauss’s theorem to find field due to: Infinitely long straight wire Uniformly charged infinite plane sheet Uniformly charged thin spherical shell (field inside and outside)

Two electric field lines never cross each other. If they intersect, then there will be two directions of electric field at the point of intersection which is not possible.

For further practice on case study questions related to Electric Charges and Fields Class 12 Physics, we recommend exploring the link given below.

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Step 1: Click on the given link. You will see the below screen.

Step 2: Fill in the necessary details. There is no need to register. Just fill your email and name and click on the button “Take Assessment”. The below screen will appear.

Step 3: Click on start assessment. Now you are ready to take test.

Frequently Asked Questions (FAQs) on Electric Charges and Fields Case Study Questions

Q1: what are case study questions for cbse examinations.

A1: Case study questions in CBSE examinations typically involve scenarios or real-life examples, requiring students to apply their understanding of concepts to solve problems or analyze situations.

Q2: Why are case study questions important for understanding class 12 physics chapters?

A2: Case study questions provide a practical context for students to apply theoretical knowledge to real-world situations, fostering deeper understanding and critical thinking skills.

Q3: How should students approach answering case study questions for CBSE?

A3: Students should carefully read the case study, identify the key issues or problems presented, analyze the information provided, apply relevant concepts and principles of chemical reactions and equations, and formulate well-supported solutions or responses.

Q4: Are there any resources available online for students to practice case study questions on class 12 physics chapters for CBSE exams?

A4: Yes, several educational websites offer case study questions for CBSE students preparing for science examinations. We also offer a collection of case study questions for all classes and subject on our website. Visit our  website  to access these questions and enhance your learning experience. If you need more case study questions for your preparation, then you visit Physics Gurukul website.

Q5: How can students effectively prepare for case study questions on “Electric Charges and Fields” for CBSE exams?

A5: Effective preparation strategies include regular revision of concepts, solving practice questions, analyzing case studies from previous exams, seeking clarification on doubts, and consulting with teachers or peers for guidance and support.

Q6: How can teachers incorporate case study questions on “Electric Charges and Fields” class 12 physics into classroom teaching?

A6: Teachers can integrate case studies into lesson plans, group discussions, or interactive activities to engage students in active learning, promote problem-solving skills, and facilitate a deeper understanding of “Electric Charges and Fields”.

Q7: Electrostatic forces are much stronger than gravitational forces. Give one example.

A7: A charged glass rod can lift a piece of paper against the gravitational pull of the earth on this piece.

Q8: What is an electric line of force? What is its importance?

A8: An electric line of force is an imaginary straight or curved path along which a small positive test charge is supposed to move when free to do so. The tangent at a point on an electric line of force gives the direction of the resultant electric field at that point. The relative closeness of electric lines of force in a certain region provides us an estimate of the electric field strength in that region

Q9: Can a charged body attract another uncharged body? Explain.

A9: Yes, a charged body can attract another uncharged body. When the charged body is placed near the uncharged body, the induced charges of opposite kind are produced on the uncharged body and the uncharged body is attract by charged body.

Q10: In Coulomb’s law, on what factors the value of electrostatic force constant K depends?

A10: It depends on the nature of medium between the two charges and also on the system of units.

Q11: Is the mass of a body affected on charging?

A11: Yes, very slightly. The negatively charged body gains mass also along with electrons.

Q12: How does a free electron at rest move in an electric field?

A12: When the electron is released, it will move in a direction opposite to the direction of electric field.

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Case Study on Electric Charges and Fields Class 12 Physics PDF

Better preparation of Case Study on Electric Charges and Fields Class 12 Physics can help students score good marks in the CBSE Class 12 Board examination. Additionally, it helps build confidence and enables students to deepen their knowledge of Electric Charges and Fields. Because case-based questions are equally important for learning and board exam preparation, our team has prepared Case Study on Electric Charges and Fields Class 12 Physics in a PDF file for free distribution among students.

Links to download the PDF file of the Electric Charges and Fields Case Study for Class 12 Physics free of cost are mentioned on this page.

Electric Charges and Fields Case Study for Class 12 Physics with Solutions in PDF

The PDF file of the Electric Charges and Fields Case Study for Class 12 Physics with Solutions is a very important study resource that can help students better prepare for the exam and boost conceptual learning.

The solutions are in the hint manner as well as contain full examples too, refer to the link to access the Case Study on Electric Charges and Fields Class 12 Physics with Solutions in PDF - it’s free.

Features of Class 12 Electric Charges and Fields Case Study Questions  

Certain features of Class 12 Electric Charges and Fields Case Study Questions are -

• Available for free 24×7
• Based on CBSE Class 12 Physics Syllabus
• Case Study Questions on Electric Charges and Fields with Answers are given

Step-wise Method to Download Case Study on Electric Charges and Fields Class 12 Physics

The below-given steps are helpful for students wanting to download Electric Charges and Fields Case Study for Class 12 Physics with Solutions in a PDF file.

• Search Selfstudys.com using the internet browser
• After loading the website, click on the navigation button

• Click on CBSE from the list of categories

• Find and Click on Case Study

• Select Class 12 and Click on Physics to download the Electric Charges and Fields case study questions in PDF. 

4 Tips to Answer Class 12 Physics Electric Charges and Fields Case Study Questions?

There are 4 solid tips to answer Class 12 Physics Electric Charges and Fields Case Study questions that we are discussing in this section.

• Read the Case Carefully: To start gathering insights from the given case-based questions, it is vital to read the Electric Charges and Fields case carefully and identify the key facts, figures, and units of measurement. Pay attention to any diagrams or graphs related to Electric Charges and Fields provided, as they may contain important information.
• Identify the Problem: While reading the Electric Charges and Fields case it is essential to consider the possible causes and effects. This will help you determine the appropriate approach to solving the problem in Class 12 Physics Electric Charges and Fields.
• Use Elimination Methods Too: Since case study questions of Class 12 Physics Electric Charges and Fields, are often framed in Multiple choice questions, students should have the knowledge of elimination methods in MCQs to better answer the questions.
• Before All, Master the Concept of Electric Charges and Fields: If the above two methods are not working for you to answer Case Study on Electric Charges and Fields Class 12 Physics then you need to revisit the lesson and master the concepts explained in the Electric Charges and Fields Class 12 Physics.

What is the Benefit of Practising Class 12 Physics Electric Charges and Fields Case Study Questions?

When a student decides to practise Class 12 Physics Electric Charges and Fields case study questions before the board examination they generally get these 3 benefits:

• Quick Conceptual Revision: Nothing is better for revision than solving relevant questions and therefore, those who involve in solving the Electric Charges and Fields Case study questions before the Class 12 Physics exam are able to better revise their conceptual learnings from the lesson.
• Better Board Exam Preparation: No doubt, the more you practise Electric Charges and Fields case study questions the better your exam preparation will be so, solving Case-based questions prior to the board examination helps a lot in the preparation. It also enables the students to know what are the Electric Charges and Fields questions which have the possibility to be asked in the board examination.
• Confident in Using Analytical or Critical Thinking Skills: The Case-based questions on Electric Charges and Fields are all about using analytical or critical thinking skills where students are required to solve problems based on the situations or data given. Thus, practising Case Study on Electric Charges and Fields Class 12 Physics benefits students to feel confident and comfortable in using analytical skills.

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Case Study Questions Class 12 Physics

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Download the app to get CBSE Sample Papers 2023-24, NCERT Solutions (Revised), Most Important Questions, Previous Year Question Bank, Mock Tests, and Detailed Notes.

CBSE will ask two Case Study Questions in the CBSE class 12 Physics questions paper. Question numbers 15 and 16 are case-based questions where 5 MCQs will be asked based on a paragraph. Each theme will have five questions and students will have a choice to attempt any four of them. You can download CBSE Class 12 Physics case study questions from the myCBSEguide App and our free student dashboard .

You can Score High

CBSE class 12 Physics question paper will carry questions for 70 marks. Certainly, the question paper is a bit easier this year. It is because the syllabus is already reduced and there are more internal choices. Besides this, the case study questions are a plus to winning the game with good marks.

In simple words, all circumstances are in favour of the sincere students who are working hard to score high this year. Although it has been a difficult time for students as they were not getting the personal attention of the teachers. We know that online classes have their own limits, but we still expect better scores, especially from students who are putting extra effort into their studies.

Class 12 Physics Case Study Questions

CBSE class 12 Physics question paper will have case study questions too. These case-based questions will be objective type in nature. So, class 12 Physics students must prepare themselves for such questions. First of all, you should study NCERT Textbooks line by line and then you should practice as many questions as possible.

Case Study Syllabus

We know that CBSE has reduced the syllabus. Hence, practice only relevant questions. don’t waste time on case study questions from deleted portion. It is of no use. You can download the latest class 12 Physics case study questions from the myCBSEguide App.

Physics Case Studies

Class 12 Physics has many chapters but all chapters are not important for case studies. As we know case studies are not exactly given from NCERT books but these may be extracted from some newspaper articles, magazines, journals or other books. So, it is very much important that you are studying only the most relevant case studies. Here, the myCBSEguide app helps you a lot. We have case study questions that are prepared by a team of expert teachers. These experts exactly know what types of questions can come in exams.

Case Study Questions

There are a number of study apps available over the internet. But if you are a CBSE student and willing to get an app for the CBSE curriculum, you have very limited options. And if you want an app that is specifically designed for CBSE students, your search will definitely end on finding myCBSEguide. Case study questions are the latest updates in CBSE syllabus. It is exclusively available in the myCBSEguide app.

Here are some example questions. For more questions, you can download the myCBSEguide App.

Physics Case Study -1

Read  the following source and answer any four out of the following questions: Electric charge is the physical property of matter that causes it to experience a force when placed in an electromagnetic field. There are two types of charges positive and negative charges. Also, like charges repel each other whereas unlike charges attract each other.

• -3.2  × ×  10 -18  C
• 3.2  × ×  10  18  C
• -3.2  × ×  10 -17  C
• 3.2  × ×  10  -17   C
• -1.6  × ×  10 -18  C
• 1.6  × ×  10  -18  C
• 2.6  × ×  10 -18  C
• 1.6  × ×  10 -21  C
• 9.1  × ×  10 -31  kg
• 9.1  × ×  10 -31  g
• 1.6  × ×  10 -19  kg
• 1.6  × ×  10 -19  g
• there is only a positive charge in the body
• there is positive as well as negative charge in the body but the positive charge is more than the negative charge
• there is equally positive and negative charge in the body but the positive charge lies in the outer regions
• the negative charge is displaced from its position
• valence electrons only
• electrons of inner shells
• both valence electrons and electrons of the inner shell.
• none of the above

Physics Case Study -2

Read the following source and answer any four out of the following questions: Resistance is a measure of the opposition to current flow in an electrical circuit. Resistance is measured in ohms. Also, Resistivity is the electrical resistance of a conductor of unit cross-sectional area, and unit length. … A characteristic property of each material, resistivity is useful in comparing various materials on the basis of their ability to conduct electric currents.

• nature of material
• temperature
• dimensions of material
• cross-sectional area
• length of wire
• wire’s nature
• all of the above
• more resistance
• less resistance
• same resistance

Physics Case Study -3

Read the source given below and answer any four out of the following questions: The Bohr model of the atom was proposed by Neil Bohr in 1915. It came into existence with the modification of Rutherford’s model of an atom. Rutherford’s model introduced the nuclear model of an atom, in which he explained that a nucleus (positively charged) is surrounded by negatively charged electrons.

• The energy of the electrons in the orbit is quantized
• The electron in the orbit nearest the nucleus has the lowest energy
• Electrons revolve in different orbits around the nucleus
• The position and velocity of the electrons in the orbit cannot be determined simultaneously
• Single proton
• Multiple electrons
• emitted only
• absorbed only
• both (a) and (b)
• none of these
•  It must emit a continuous spectrum
•  It loses its energy
• Gaining its energy
• A discrete spectrum
• dequantized

Physics Case Study & myCBSEguide App

We at myCBSEguide provide the best case study questions for CBSE class 12 Physics. We have Physics case study questions for every chapter in 12th class Physics. Students can access the Physics case study questions with answers on the myCBSEguide App or on the student dashboard . Here are some features that make myCBSEguide the best learning app for CBSE students:

• Updated syllabus
• Up to date question bank
• Model papers and 10-year questions
• NCERT and Exemplar sulutions
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• Detailed revision notes

12 Physics Question Paper Design

Here is the question paper design for CBSE class 12 Physics. It shows the typology of the questions and their weightage in CBSE board exams.

QUESTION PAPER DESIGN Theory (Class: 12)

Maximum Marks: 70 Duration: 3 hrs

Note:  The above template is only a sample. Suitable internal variations may be made for generating similar templates keeping the overall weightage to different forms of questions and typology of questions the same.

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2 thoughts on “Case Study Questions Class 12 Physics”

Good question l will check answers sheet

Question 2 answer key ?

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