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FARADAY’S LAW ACTIVE LERNING ASSIGMENT

FARADAY’S LAW ACTIVE LERNING ASSIGMENT. PREPARED BY:- NAME :- ENROLLMENTNO. MEHA :- 130410116026 DEVANSHI :- 130410116017 PINKY :-130410116045 RICHA :-130410116009 GUIDED BY:- SAGAR AHIRE. Electromagnetic Induction. Magnetic Flux.

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FARADAY’S LAW ACTIVE LERNING ASSIGMENT

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  1. FARADAY’S LAWACTIVE LERNING ASSIGMENT PREPARED BY:- NAME :- ENROLLMENTNO. MEHA :- 130410116026 DEVANSHI :- 130410116017 PINKY :-130410116045 RICHA :-130410116009 GUIDED BY:- SAGAR AHIRE

  2. Electromagnetic Induction Magnetic Flux If B is constant

  3. Electromagnetic Induction

  4. Electromagnetic Induction

  5. Electromagnetic Induction Faraday’s Law coil

  6. Faraday’s law In 1831, Micheal Faraday formulated two laws on the bases of experiments. These laws are called Faraday's laws of electromagnetic induction.

  7. FIRST LAW First Law of Faraday's Electromagnetic Induction state that whenever a conductor are placed in a varying magnetic field emf are induced which is called induced emf, if the conductor circuit are closed current are also induced which is called induced current. Or Whenever a conductor is rotated in magnetic field emf is induced which are induced emf. SECOND LAW Second Law of Faraday's Electromagnetic Induction state that the induced emf is equal to the rate of change of flux linkages (flux linkages is the product of turns, n of the coil and the flux associated with it). Faraday’s law

  8. Faraday’s law’s explanation Let Initial flux linkages = Nφ1 Final flux linkages = Nφ2 Change in flux linkages= Nφ2 – Nφ1 =N((φ2-φ1) If (φ2-φ1)= φ Then change in flux linkages=Nφ Rate of change of flux linkages= Nφ/t wb/sec Taking derivative of right hand side we get

  9. Faraday’s law’s explanation Rate of change of flux linkages= Ndφ/dt wb/sec Rut according to Faraday's laws of electromagnetic induction, the rate of change of flux linkages equal to the induced emf, hence we can write = Ndφ/dt volt Generally Faraday's laws is written as e = -Ndφ/dt volt Where negative sign represents the direction of the induced current in the conductor will be such that the magnetic field produced by it will oppose the verb cause produce it.

  10. Electromagnetic Induction Faraday’s Law • This phenomena is called electromagnetic induction and is described by Faraday’s law. Write Faraday’s law. • In order to understand Faraday’s law we need to understand the concept of magnetic flux. Write the definition of magnetic flux.

  11. Faraday’s law • From the experimental observation, faraday arrived at a conclusion that an emf is induced in a when magnetic flux through the coil changes with time. • Faraday’s law of electromagnetic induction which gives the magnitude of induced emf. • The law is stated below. “The magnitude of the induced emf produced in a closed circuit is equal to the nagetive of the time rate of change of magnetic flux linked with it.”

  12. Faraday’s law • The total induced emf in a coil of N turns,

  13. The magnitude is the common area and the direction is normal to the area. dA Electromagnetic Induction Faraday’s Law • The magnetic flux is exactly like the electric flux we studied in Gauss’s law. The flux is defined in terms of a vector area dA. Describe the magnitude and direction of this vector.

  14. Electromagnetic Induction Lenz’s Law • The direction of the emf and thus the current is given by Lenz’s law. Use this to find the direction of the current. If you are looking down on the loop from above, the current is flowing clockwise.

  15. Electromagnetic Induction The magnetic is moving away from the coil so the magnetic field is decreasing, thus the current is in a direction to off-set the decrease. Lenz’s Law The magnetic is moving toward the coil so the magnetic field is increasing, thus the current is in a direction to off-set the increase.

  16. Electromagnetic Induction Faraday’s Law

  17. Electromagnetic Induction Faraday’s Law .

  18. Electromagnetic Induction Faraday’s Law

  19. Electromagnetic Induction Faraday’s Law

  20. Electromagnetic Induction Faraday’s Law • Show that when you integrate the emf, e with respect to time you get the average change in flux in time t. Average value

  21. Faraday’s law • faraday’s law with disc generator

  22. Electromagnetic Induction The Most Important Point of Faraday’s Law A changing magnetic field produces or creates an electric field. Two types of electric fields. One is created by charge and the other is created by a changing magnetic field.

  23. Electromagnetic Induction Example: Induction stove • The pan on the stove is heated by eddy currents produced by induction.

  24. Electromagnetic Induction Application of Faraday’s Law • Generator

  25. Electromagnetic Induction Application of Faraday’s Law • Magnetic Recording

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