logo
Log in
  Get Rs 200 off on Oswal Premium Plan for your board preperatoin! For Class 9th till 12th. Use Coupon Code BOARD200 at checkout.
logo
Log in
Start Free Trial
Electromagnetic Induction

Home / Boards / CBSE / Important Questions / Class 12 / Physics / Electromagnetic Induction

Class 12 Physics Chapter 6
Electromagnetic Induction
Important Questions

exam preparation with oswal.io
Mastering a diverse range of question formats within ‘Electromagnetic Induction’ is crucial for the Class 12 syllabus. These class 12 physics electromagnetic induction important questions and answers serve as an invaluable resource for comprehensive preparation. They empower students to confidently address uncertainties, bolster their self-assurance, and refine their problem-solving abilities. Engaging with these important questions electromagnetic induction enables students to strengthen their understanding of the fundamental concepts in this field. With the objective of consolidating knowledge in this domain, these important questions from electromagnetic induction ensure that students approach their exams with a profound sense of confidence and proficiency.

Introduction

Exploring ‘Electromagnetic Induction’ reveals an intriguing chapter in Class 12 Physics, delving into the captivating realm of electromagnetic principles and their practical applications. This section encompasses fundamental concepts such as Faraday’s law, Lenz’s law, electromagnetic induction, and their intricate connections. Mastery of these principles transcends theoretical boundaries, carrying immense practical significance across various technological domains. This chapter unravels the intricacies of inducing electric currents through changing magnetic fields, elucidating the profound impact of this phenomenon on technological advancements. Engaging with important questions in electromagnetic induction aims to foster a comprehensive understanding of this pivotal chapter.

What are Electromagnetic Induction?

Electromagnetic induction is a fundamental principle in physics that describes the generation of an electromotive force (EMF) or voltage in a conductor when it is exposed to a changing magnetic field. This phenomenon, discovered by Michael Faraday, demonstrates that a relative motion between a conductor and a magnetic field induces an electric current or voltage in the conductor. It’s the principle behind the functioning of generators, transformers, and various electrical devices, forming the basis of electromagnetic technology. oswal.io provides important questions electromagnetic waves which can help you in preparing for examination.

Class 12 Physics Electromagnetic Induction Important Questions and Answers

Q1. When current in a coil changes from 5 A to 2 A in 0.1 s, average voltage of 50 V is produced. The self inductance of the coil is:
Options
(a) 1.67 H
(b) 6 H
(c) 3 H
(d) 0.67 H

Ans. (a) 1.67 H

Explanation:
\varepsilon=-I \dfrac{d I}{d t} \\[5.5 bp] 50=-\dfrac{(2-5)}{0.1} \\[5.5 bp] \therefore \quad L=\dfrac{50 \times 0.1}{3}=\dfrac{5}{3}=1.67 \mathrm{H}

Q2. Faraday’s law of electromagnetic induction is related to:
Options
(a) Resistance
(b) Magnetic field strength
(c) Induced electric field
(d) Capacitance

Ans. (c) Induced electric field

Explanation: Faraday’s law of electromagnetic induction is related to the induced electric field produced by a changing magnetic field.

Q3. How would you demonstrate the presence of an induced current in the absence of a galvanometer ?

Explanation:
Replace the galvanometer by a small bulb, the one of the same kind, found in a small torch light. The relative motion between the two coils will cause the bulb to glow and thus demonstrate the presence of an induced current.

Q4. A bar magnet is moved in the direction indicated by the arrow between two coils PQ and CD. Predict the direction of the induced current in each coil.
important questions in electromagnetic induction

Explanation:
From Q to P (i.e., clockwise) as seen from the right end.
From C to D (i.e., clockwise) as seen from the left end.

Q5. Predict the polarity of the capacitor in the situation described below :
important questions electromagnetic induction

Explanation:
As bar magnets moving towards the capacitor, it will induce on emf which opposes the variation in magnetic flux. Thus, current flow in anticlockwise direction when seen from left side and its direction is clockwise direction when seen from right hand side.
Hence, current flow in clockwise direction. A will be positive and B will be negative.

CBSE Class 12 Physics Chapter wise Important Questions

Chapter No.Chapter Name
Chapter 1Electric Charges and Fields
Chapter 2Electrostatic Potential and Capacitance
Chapter 3Current Electricity
Chapter 4Moving Charges and Magnetism
Chapter 5Magnetism and Matter
Chapter 6Electromagnetic Induction
Chapter 7Alternating current
Chapter 8Electromagnetic Waves
Chapter 9Ray Optics and Optical Instruments
Chapter 10Wave Optics
Chapter 11Dual Nature of Radiation and Matter
Chapter 12Atoms
Chapter 13Nuclei
Chapter 14Semiconductor Electronics: Materials, Devices and Simple Circuits

Conclusion

Understanding the core principles governing the generation of electric currents through changing magnetic fields is vital in comprehending Electromagnetic Induction in Class 12 Physics. Platforms like oswal.io provide important questions about electromagnetic induction, facilitating comprehensive learning and preparation. These resources act as valuable aids for students to master the fundamental aspects of electromagnetic science, thereby enhancing their comprehension of this crucial aspect of physics.

Frequently Asked Questions

Ans: Electromagnetic Induction is the phenomenon where a changing magnetic field induces an electromotive force (EMF) or voltage in a conductor. This induction occurs due to relative motion between the conductor and the magnetic field.
Ans: Faraday’s Law states that the induced EMF in a conductor is directly proportional to the rate of change of magnetic flux through the conductor. It’s expressed as EMF = -dΦ/dt, where Φ is the magnetic flux.
Ans: Electromagnetic Induction is the underlying principle behind the operation of generators, transformers, induction cooktops, and magnetic levitation systems. It’s also crucial in various technologies like wireless charging and magnetic data storage.
Ans: Generators use electromagnetic induction to convert mechanical energy into electrical energy. Rotating coils within a magnetic field induce an EMF, creating an electric current.
Ans: The magnitude of induced EMF depends on the rate of change of magnetic flux, the number of turns in the coil, the strength of the magnetic field, and the orientation of the coil concerning the magnetic field.
Chapter Wise  Important Questions for CBSE Board Class 12 Physics
Electric Charges and Fields
Electrostatic Potential and Capacitance
Current Electricity
Moving Charges and Magnetism
Magnetism and Matter
Electromagnetic Induction
Alternating current
Electromagnetic Waves
Ray Optics and Optical Instruments
Wave Optics
Dual Nature of Radiation and Matter
Atoms
Nuclei
Semiconductor Electronics: Materials, Devices and Simple Circuits
logo
Instagram Linkedin-in Facebook-f Youtube Twitter
logo
Instagram Linkedin-in Facebook-f Youtube Twitter

CBSE Important Questions Class 10

ICSE Important Questions Class 10

CBSE Important Questions Class 10

ICSE Important Questions Class 10

Contact Us

© Copyright 2025 oswal.io by
Oswal Publishers Simplifying Exams