Faraday’s law of induction/ презентация
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- 2. Lecture 13 Faraday’s law of induction Lenz’ law Eddy currents Maxwell’s
- 3. When a magnet is moved toward a loop of wire connected
- 4. From these observations, we conclude that the loop detects that the
- 5. Initially, when the switch is open, no current is detected by
- 6. So when the switch was open, and is closed, the changing
- 7. Summary of the two experiments An electric current can be induced
- 8. Faraday’s Law of Induction The emf induced in a circuit is
- 9. Loop in a uniform magnetic field A conducting loop that encloses
- 10. Lenz’s Law Faraday’s law (=-dФB/dt) indicates that the induced emf and
- 11. Picture (a): When the magnet is moved toward the stationary conducting
- 12. As the conducting bar slides on the two fixed conducting rails,
- 13. Induced emf and Electric Fields A conducting loop of radius r
- 14. =-dФB/dt =-dФB/dt The work done by the electric field in moving
- 15. The magnet flux through the ring is: The magnet flux through
- 16. General form of Faraday’s Law of Induction Here is
- 17. Eddy Currents Circulating currents called eddy currents are induced in bulk
- 18. Eddy currents appears in a solid conducting plate moving through a
- 19. As the conducting plate enters the field (position 1), the eddy
- 20. Maxwell’s Equations Maxwell’s equations applied to free space, that is, in
- 21. Equation (1): Equation (1): Here integration goes across an enclosed surface,
- 22. Equation (2): Equation (2): Here integration goes across an enclosed surface.
- 23. Equation (3): Equation (3): Here integration goes along an enclosed path,
- 24. Equation (4): Equation (4): This is Ampère–Maxwell law, or the generalized
- 25. Maxwell’s Equations Symmetry Equations (1) and (2) are symmetric, apart from
- 26. Maxwell’s equations predict the existence of electromagnetic waves (traveling patterns of
- 27. Units in Si Emf V Electric Flux ФE V*m Magnetic Flux ФB T*m2
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