Electromagnetic Induction Class 12 Case Study Questions Physics Chapter 6

Download CBSE and ICSE Books in PDF Format

Reading Time: 8 minutes

Last Updated on December 26, 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 6 Electromagnetic Induction.

Chapter	Electromagnetic Induction
Type of Questions	Case Study Questions
Nature of Questions	Competency Based Questions
Board	CBSE
Class	12
Subject	Physics
Unit	Unit 4 Electromagnetic Induction and alternating currents
Useful for	Class 12 Studying Students
Answers provided	Yes
Difficulty level	Mentioned
Important Link	Class 12 Physics Chapterwise Case Study

Customised Study Materials for Teachers, Schools and Coaching Institute

Table of Contents

Case Study Questions on Electromagnetic Induction

Questions

Question 1:

The emf induced across the ends of a conductor due to its motion in a magnetic field is called motional emf. It is produced due to the magnetic Lorentz force acting on the free electrons of the conductor. For a circuit shown in figure, if a conductor of length $l$ moves with velocity $v$ in a magnetic field $B$ perpendicular to both its length and the direction of the magnetic field, then all the induced parameters are possible in the circuit.
Read the given passage carefully and give the answer of the following questions:

Read the given passage carefully and give the answer of the following questions:

Q. 1. Direction of current induced in a wire moving in a magnetic field is found by which rule?

Q. 2. A conducting rod of length l is moving in a transverse magnetic field of strength B with velocity v. The resistance of the rod is R. What is
the current in the rod?

Q. 3. A 0.1 m long conductor carrying a current of 50 A is held perpendicular to a magnetic field of 1.25 mT. What will be the required mechanical power to move the conductor with a speed of 1 ms^-1?

Q. 4. A bicycle generator creates 1.5 V at 15 km/hr. Wha is the emf generated at 10 km/hr?

Q. 5. What is the dimensional formula for emf e in SI system?

Answers

1. Direction of current induced in a wire moving in a magnetic field is found by using Fleming’s right hand rule.

2. Induced emf $\varepsilon=B l v$ Current in the rod, $I=\frac{\varepsilon}{R}=\frac{B l v}{R}$

But current in rod is possible only if the rod forms a part of closed circuit.

3. Here, $l=0.1 \mathrm{~m}, v=1 \mathrm{~m} \mathrm{~s}^{-1}$

$$
I=50 \mathrm{~A}, B=1.25 \mathrm{mT}=1.25 \times 10^{-3} \mathrm{~T}
$$

The induced emf is $\varepsilon=B l v$
The mechanical power is

$$
\begin{aligned}
P & =\varepsilon l=B l v l=1.25 \times 10^{-3} \times 0.1 \times 1 \times 50 \\
& =6.25 \times 10^{-3} \mathrm{~W}=6.25 \mathrm{~mW}
\end{aligned}
$$

4. emf induced, $\varepsilon=B l v$

Here, $\vec{B}, \vec{l}$ and $\vec{v}$ are mutually perpendicular
For given $B$ and $I, \varepsilon \propto v$.

$$
\therefore \quad \frac{\varepsilon_1}{\varepsilon_2}=\frac{v_1}{v_2}
$$

Here, $\varepsilon_1=1.5 \mathrm{~V}, v_1=15 \mathrm{~km} / \mathrm{hr}=15 \times \frac{5}{18} \mathrm{~ms}^{-1}$

$$
\begin{aligned}
& v_2=10 \mathrm{~km} / \mathrm{hr}=10 \times \frac{5}{18} \mathrm{~m} \mathrm{~s}^{-1}, \varepsilon_2=? \\
& \therefore \quad \frac{1.5}{\varepsilon_2}=\frac{15 \times \frac{5}{18}}{10 \times \frac{5}{18}}=\frac{3}{2} \Rightarrow \varepsilon_2=1 \mathrm{~V}
\end{aligned}
$$

5. $\varepsilon=\frac{[W]}{q}=\frac{\left[\mathrm{ML}^2 \mathrm{~T}^{-2}\right]}{[\mathrm{AT}]}=\left[\mathrm{ML}^2 \mathrm{~T}^{-3} \mathrm{~A}^{-1}\right]$

Also check

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

We hope the given case study questions for Electromagnetic Induction Class 12 helps you in your learning.

Download eBooks for CBSE Class 12 Physics (Exam Special)

Topics from which case study questions may be asked

Electromagnetic Induction
Faraday’s Laws of Induction
Induced EMF and Current
Lenz’s Law
Self and Mutual Induction

Whenever there is change in magnetic flux linked with a circuit, an emf is induced in the circuit. The induced emf lasts as long as the change in magnetic flux continues.

For further practice on case study questions related to Electromagnetic Induction Class 12 Physics, we recommend exploring the link given below.

Practice More Case Study Questions on “Electromagnetic Induction”

Frequently Asked Questions (FAQs) on Electromagnetic Induction 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 “Electromagnetic Induction” 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 “Electromagnetic Induction” 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 “Electromagnetic Induction”.

Q7: The induced emf is sometimes called back emf. Why?

A7: Because induced emf opposes the current due to the source of emf.

Q8: What causes sparking in the switches when light is put off?

A8: Large induced emf at break causes the sparking.

Q9: A cylindrical bar magnet is kept along the axis of a circular coil. Will there be a current induced in the coil if the magnet is rotated about its axis? Give reasons.

A9: No, there is no change in the flux linking to the coil.

Q10: Will an induced current be always produced whenever there is a change in magnetic flux linked with a coil?

A10: Change in magnetic flux induces emf, but induced current is produced only when the circuit is closed.

Download Customised White Label Study Materials in MS Word Format

We are providing teaching resources to teachers and coaching institute looking for customised study materials in MS word format. Our High-quality editable study material which is prepared by the expert faculties are Highly useful for Teachers, Mentors, Tutors, Faculties, Coaching Institutes, Coaching Experts, Tuition Centers.

Download Product Brochure