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SARDAR VALLABHBHAI PATEL INSTITUTE OF TECHNOLOGY -VASAD

SARDAR VALLABHBHAI PATEL INSTITUTE OF TECHNOLOGY -VASAD. Active Learning Assignments. LAWS OF FARADAY. BRANCH : -ELECTRONICS AND COMMUNICATION. Guide Teacher : PRIYANKA THAKRE. Michael Faraday.

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SARDAR VALLABHBHAI PATEL INSTITUTE OF TECHNOLOGY -VASAD

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  1. SARDAR VALLABHBHAI PATEL INSTITUTE OF TECHNOLOGY -VASAD Active Learning Assignments LAWS OF FARADAY BRANCH : -ELECTRONICS AND COMMUNICATION Guide Teacher : PRIYANKA THAKRE

  2. Michael Faraday Michael Faraday (1791-1867)British physicist and chemist, best known for his discoveries of electromagnetic induction and of the laws of electrolysis. His biggest breakthrough in electricity was his invention of the electric motor.

  3. Induced EMF A current flows through the loop when a magnet is moved near it, without any batteries! The needle deflects momentarily when the switch is closed

  4. Faraday’s Law of Induction The emf induced in a circuit is directly proportional to the time rate of change of the magnetic flux through the circuit. = Magnetic Flux where, For N loops,

  5. MAGNETIC FLUX THROUGH WIRE LOOP (1) Uniform B (2) Non-Uniform B

  6. Ways to Induce EMF • The magnitude of B • The area enclosed by the loop • The angle between B and the normal to the area • Any combination of the above To induce an emf we can change,

  7. Induced EMF is in direction that opposesthe change in flux that caused it. Hence a (–ve) sign is put in the equation. Lenz’s Law

  8. 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.

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

  10. Induced EMF and Electric Fields Electric Field Inside a Conductor Changing Magnetic Flux EMF This induced electric field is non-conservative and time-varying. A changing magnetic field produces or creates an electric field. General Form of Faraday’s Law

  11. Applications of Faraday’s Law Generators Motors

  12. Applications of Faraday’s Law Very Low Frequency (VLF) Metal Detector The receiver coil is completely shielded from the magnetic field generated by the transmitter coil. However, it is not shielded from magnetic fields coming from objects in the ground. Therefore, when the receiver coil passes over an object giving off a magnetic field, a small electric current travels through the coil. The coil amplifies the frequency and sends it to the control box of the metal detector, where sensors analyze the signal.

  13. Applications of Faraday’s Law Induction Stovetops

  14. Applications of Faraday’s Law Magnetic Recording

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