Best Physics Coaching Jalandhar

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IIT JEE Physics Study Material

Physics IIT JEE Study Materials are designed by our highly experienced physics faculty experts who have put tremendous efforts and devoted a lot of their energy and time in preparing well-structured study material for Physics IIT JEE covering all the important facts, formulas, and concepts included in your exam syllabus.

Highlights Of IIT JEE Physics Study Material

IIT JEE Physics Study Materials for JEE Mains & Advanced have been prepared with an objective of an overall evolution of students’ concepts in a manner that the students understand all the theorems, formulas, and derivations quite effectively by linking them with their practical applications and illustrating effectively solved problems in the simplest possible ways.

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Lecture of Electromagnetic Induction (Introduction)

What is Electromagnetic Induction?

Electromagnetic Induction was discovered by Michael Faraday in 1831, and James Clerk Maxwell mathematically described it as Faraday’s law of induction.

Electromagnetic Induction is a current produced because of emf (electromotive force)  or voltage production due to a changing magnetic field.

This either happens when a conductor is placed in a moving magnetic field (when using an AC power source) or when a conductor is constantly moving in a stationary magnetic field.

As per the setup given below, Michael Faraday arranged a conducting wire attached to a device to measure the voltage across the circuit. When a bar magnet is moved through the coiling, the voltage detector measures the voltage in the circuit.

The following factors that influence this voltage production. They are:

1. Number of Coils: The induced voltage is directly proportional to the number of turns/coils of the wire. Greater the number of turns, greater is voltage produced
2. Changing Magnetic Field: Changing magnetic field affects the induced voltage. This can be done by either moving the magnetic field around the conductor or moving the conductor in the magnetic field.

Applications of Electromagnetic Induction

Based on his experiments we now have Faraday’s law according to which the amount of voltage induced in a coil is proportional to the number of turns of the coil and the rate of changing magnetic field.

• AC generators work on the principle of electromagnetic induction.
• The working of electrical transformers are based on electromagnetic induction.
• The magnetic flow meter is based on electromagnetic induction.

Electromagnetic Induction Formula

Mathematically, the induced voltage can be given by the following relation:

e = N × dΦ / dt

Where,

• e = the induced voltage (in volts)
• N = the number of turns in the coil
• Φ = the magnetic flux – the amount of magnetic field at a surface (in Webbers)
• t = the time (in seconds)

The significance of this discovery is a way of producing electrical energy in a circuit by using magnetic fields and not just batteries. Everyday machines like motors, generators and transformers work on the principle of electromagnetic induction.

Frequently Asked Questions (FAQs)

Who discovered Electromagnetic Induction?

Electromagnetic Induction was discovered by Michael Faraday in 1831.

Define Electromagnetic Induction (EMI).

Electromagnetic Induction is a current produced because of voltage production (electromotive force) due to change in magnetic field.

What is the significance of Electromagnetic Induction?

The significance of Electromagnetic Induction is a way of producing electrical energy in a circuit by using changing magnetic fields and not just batteries.

What are the applications of Electromagnetic Induction?

1. AC generators work on the principle of electromagnetic induction.
2. The working of electrical transformers are based on electromagnetic induction.
3. The magnetic flow meter is based on electromagnetic induction.

Other applications :

1. Current clamp.
2. Electric generators.
3. Electromagnetic forming.
4. Graphics tablet.
5. Hall effect sensors.
6. Induction cooking.
7. Induction motors.
8. Induction sealing.

Which machines work on the principle of Electromagnetic Induction?

Machines like motors, generators and transformers work on the principle of electromagnetic induction.

Coaching for Physics in Jalandhar

Click the link below to teach / view the detailed explanation of Chapter Electromagnetic Induction (Introduction)

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