## Category: Electromagnetic induction class 12 important topics

Make sure that your basics are strong in physics as it will help you to crack the upcoming exams. To be clear with your basics you need to understand the concepts and test yourself by attempting the NCERT exercise questions. You will also be in the use of these solutions to practice and revise the exercise questions and answers during the exams. Electromagnetic Induction is a significant phenomenon in the field of science having a wide range of applications.

This principle has a wide range of applications in electrical appliances. It may be a transformer or a motor these electrical devices fundamentally work based on the principle of electromagnetic induction.

Besides that, there is also various other application in several fields. They found that moving charges produce magnetism but the question arises that do moving magnets can also produce electricity.

In this chapter, you will learn more about Electromagnetic Induction. In order to score good marks in the upcoming exams and more than that to crack the national level, competitive exams like JEE Main one needs good conceptual knowledge and strong basics. Thus, in order to build a strong basics, one has to go through the respective chapters thoroughly, solve the exercise questions and other questions. Besides that, it is also a good practice to solve chapter-wise tests to check where you stand with the present preparation.

If you have any question feel free to post it in the comment below. We will get back to you at the earliest. Support: support embibe. General: info embibe. Section Name Section Name 6. Section Name. Magnetic Flux. Motional Electromotive Force. Energy Consideration: A Quantitative Study. Eddy Currents. Mutual Inductance. AC Generator.In this chapter, students will study the phenomena associated with changing magnetic fields and understand the underlying principles.

The phenomenon in which electric current is generated by varying magnetic fields is appropriately called electromagnetic induction. Diagrams, graphs, illustrations, energy diagrams and examples associated to daily life make this chapter very interesting and easy to learn.

Solved numeral problems and unsolved ones for practice make the students understand the concept better and develop a strong grip on the subject. The contribution of eminent scientists such as Faraday, Henry, Lenz and others towards electromagnetic induction has helped to develop laws on the topic that the students shall study through this chapter. Detailed derivations to help derive formulas and equations will aid to solve the problems and understand the concepts.

Unit 4 holds a total weightage of 8 marks in the final examination according to the latest pattern. The topics and sub-topics in Chapter 6 Electromagnetic Induction are given below. We cover all exercises in the chapter given below Other than given exercises, you should also practice all the solved examples given in the book to clear your concepts on Electromagnetic Induction.

Download the free PDF of Chapter 6 Electromagnetic Induction and take the print out to keep it handy for your exam preparation. We cover all exercises in the chapter given below:- Chapter 6 Exercises - 17 Questions with Solutions. Do you need help with your Homework? Are you preparing for Exams? Study without Internet Offline. Download pdf for free! Loading More Solutions Get this solution now!

Download our free PDF or App. Get Solution now! Chapter 1 - Electric Charges and Fields. Chapter 2 - Electrostatic Potential and Capacitance. Chapter 3 - Current Electricity. Chapter 4 - Moving Charges and Magnetism. Chapter 5 - Magnetism And Matter. Chapter 7 - Alternating Current. Chapter 8 - Electromagnetic Waves.

Chapter 9 - Ray Optics and Optical Instruments. Chapter 10 - Wave Optics. Chapter 11 - Dual Nature of Radiation and Matter.

Chapter 12 - Atoms. Chapter 13 - Nuclei. Chapter 15 - Communication Systems. Home Tuition in Indian Cities.While preparing for CBSE Class 12 th Physics board examstudents should give priority to topics given in this article.

Students preparing for CBSE Class 12 Physics board exam should know about important topics and derivations from these 15 chapters. But, after the analysis of some previous year papers of CBSE Class 12th Physics, we have identified some important derivations, topics and questions which are extremely important for CBSE Class 12th Physics board exam.

Complete details related to important derivations and topics which can be asked in CBSE Class 12 board exam are given below:.

### Electromagnetic Induction Class 12 Notes

There are two chapters in this unit. Important topics and derivations of these chapters are given below:. There is only 1 chapter in this unit that is Current Electricity. Important concepts and derivations expected to be asked in CBSE Class 12 Physics board exam from this chapter are given below:. Unit 3: Magnetic Effects of Current and Magnetism. Application of Biot - Savart law Calculation of magnetic field due to current carrying circular loop. Force on a current-carrying conductor in a uniform magnetic field Derivation and Numerical Problems.

Magnetic field intensity due to a magnetic dipole bar magnet along its axis and perpendicular to its axis. Unit 4 Electromagnetic Induction and Alternating Current. There are two chapters in this unit of Class 12 Physics Syllabus. Name of these chapters are Electromagnetic Induction and Alternating Current. Numerical Problems and Derivations. There is only one chapter in this unit and that is Electromagnetic waves.

Important topics and derivations of this chapter are given below:. There are 2 chapters in this unit. Unit 7: Dual Nature of Radiation and Matter. There is only one chapter in this unit. Name of the chapter is Dual Nature of Matter and Radiation. Important topics of this chapter are given below:. Name of these chapters are: Atoms and Nuclei.

Binding energy per nucleon and its variation with mass number Definition and Numerical Problems. Only one chapter is there in this unit. While preparing for CBSE Class 12th Physics board examstudents should give priority to the topics mentioned above. Study at Home. School Board. Current Affairs. Mock Tests. Latest Admission Hindi Feedback Menu. This website uses cookie or similar technologies, to enhance your browsing experience and provide personalised recommendations.

By continuing to use our website, you agree to our Privacy Policy and Cookie Policy. Electric filed intensity due to a thin infinite plane sheet of charge.

Chapter 2: Electrostatic Potential and Capacitance. Capacitance of parallel plate capacitor with or without dielectric medium. Series and parallel connection of resistors Derivations and Numerical Problems. Chapter — 4: Moving Charges and Magnetism.Discovery and understanding of electromagnetic induction are based on a long series of experiments carried out by Henry and Faraday.

If North-pole of a bar magnet is pushed towards the coil, the pointer in the galvanometer deflects, indicating the presence of electric current in the coil. This deflection lasts as long as the bar magnet remains in motion. This shows that the relative motion between the magnet and the coil that is responsible for generation induction of electric current in the coil. If the bar magnet is replaced by a second coil C 2 as shown in figure given above connected to a battery.

The steady current in the coil C 2 produces a steady magnetic field. If coil C 2 is moved towards the coil C 1then the galvanometer shows a deflection. This indicates that electric current is induced in coil C 1.

### NCERT Solutions Class 12 Physics Chapter 6 PDF – Download Electromagnetic Induction

When C 2 is moved away, the galvanometer shows a deflection again, but this time in the opposite direction. The deflection will be observed as long as coil C 2 is in motion. When the coil C 2 is held fixed and C 1 is moved, the same effects are observed.

Again, it is the relative motion between the coils that induces the electric current. Faraday showed that this relative motion is not an absolute requirement. Figure given above shows two coils C 1 and C 2 held stationary. Coil C 1 is connected to galvanometer G while the second coil C 2 is connected to a battery through a tapping key K.

The galvanometer shows a momentary deflection when the tapping key K is pressed. The pointer in the galvanometer returns to zero immediately. If the key is held pressed continuously, there is no deflection in the galvanometer. When the key is released, a momentory deflection is observed again, but in the opposite direction. It is also observed that the deflection increases dramatically when an iron rod is inserted into the coils along their axis.

SI unit of magnetic flux is weber. It is the phenomenon of production of e. The e. The magnitude of the induced emf in a circuit is equal to the time rate of change of magnetic flux through the circuit. Negative sign shows that the current induced in a circuit always flows in such a direction that it opposes the change or the cause that it opposes the change or the cause produces it.

In the case of a closely wound coil of N turns, change of flux associated with each turn, is the same. Therefore, the expression for the total induced emf is given by. The polarity of induced emf is such that it tends to produce a current which opposes the change in magnetic flux that produced it.

In the above figure awhen the North-pole of a bar magnet is being pushed towards a closed coil the magnetic flux through the coil increases.We know Physics is tough subject within the consortium of science subjects physics is an important subject.

You need to have strong fundamentals in physics to crack the exam. These Questions with solution are prepared by our team of expert teachers who are teaching grade in CBSE schools for years.

There are around set of solved Physics Extra Questions from each and every chapter. The students will not miss any concept in these Chapter wise question that are specially designed to tackle Board Exam. Download as PDF. Class — 12 Physics Electromagnetic Induction. A pair of adjacent coils has a mutual inductance of 1. If the current in one coil changes from 0 to 20 A in 0. The magnetic field between the Horizontal poles of an electromagnet is uniform at any time, but its magnitude is increasing at the rate of 0.

Induced emf and the induced current in the circuit are. The coefficient of self inductance of the coil is:. A train is moving with uniform velocity from north to south. Will any induced emf appear across the ends of the axle? A metallic piece gets hot when surrounded by a coil carrying high-frequency alternating current.

Predict the direction of induced current in metal rings 1 and 2 when current I in the wire is steadily decreasing? Show that the energy stored in an inductor i.

A long solenoid of 20 turns per cm has a small loop of area 4 cm 2 placed inside the solenoid normal to its axis. If the current by the solenoid changes steadily from 4 A to 6A in 0. A conducting U tube can slide inside another U-tube maintaining electrical contact between the tubes.

The magnetic field is perpendicular to the plane of paper and is directed inward.

## Electromagnetic Induction Class 12 Physics Important Questions

Each tube moves towards the other at constant speed v. Find the magnitude of induced emf across the ends of the tube in terms of magnetic field B, velocity v and width of the tube?

The other end of the rod is in contact with a circular metallic ring. A constant magnetic field of 0. Calculate the emf developed between the centre and the ring.Get important questions of Electromagnetic Induction Class 12 for Boards exams. View the Physics Question Bank Class 12 for all the chapters along with important questions and answers along with electromagnetic induction. This question bank is designed keeping NCERT in mind and the questions are updated with respect to upcoming Board exams.

You will get here all the important questions for class 12 Physics chapters. Learn the concepts of Electromagnetic Induction with these important questions and answers and prepare for Class 12 and other competitive exams. Does change in magnetic flux induce emf or current? Emf is always induced but current will be induced only when the circuit is complete. A cylindrical bar magnet is kept along the axis of a circular coil as shown in figure.

UNIT-4-EMI and AC- Important Questions- Yudhabhyas-2019 - Physics Baba

Give reason. No, because flux passing through the coil is constant. A magnet is moved in the direction indicated by an arrow between two coils AB and CD as shown in the figure. Suggest the direction of current in each coil. Hence currents induced in both the coils will flow clockwise when seen from the magnet side. The closed loop PQRS is moving into a uniform magnetic field acting at right angles to the plane of the paper as shown in the figure. State the direction in which the induced current flows in the loop.

In the following figure two coils are arranged co-axially what will be the direction of induced currents. If i In figure Akey K of the circuit of coil P is just closed ii In figure B rheostat setting being changed as shown. Hence current in loop as seen by observer is clockwise. An infinitely long current carrying wire is passing through the centre of a circular wire loop as shown in figure.

If current through the straight wire is decreasing at a steady rate, then what will be the direction of induced current in loop if any. No current induces in the loop, because magnetic lines of forces lie in the plane of the loop.

A wire of irregular shape turning into a circular shape as shown in figure. What will be the induced current in wire if any. In this situation area of the loop tends to increase. Therefore, magnetic flux linked with the loop increases. In the following figure three moving loops are shown. What will be the direction of induced current in them.

In loop P, anticlockwise current induces. In loop Q, no current induces. In loop R, clockwise current induces. A closed loop is held stationary in the magnetic field between the north and south poles of two permanent magnets held fixed. Can we hope to generate current in the loop by using very strong magnets?Electromagnetic induction is a phenomenon in which the rate of change of flux through a coil causes an induced emf.

Due to this induced emf, an induced current is created inside the coil. The topics and sub-topics covered in Electromagnetic Induction Class 12 Notesare:.

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## CBSE Class 12 Physics : Important Topics and Tips for Finals

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