Sources of the мagnetic field/ презентация
Содержание
- 2. Lecture 12 Sources of the Magnetic Field The Biot-Savart Law Ampere’s
- 3. Current Produces Magnetic Field The magnetic field dB at a point
- 4. The Biot-Savart Law The experimental observations for the magnetic field dB
- 5. The foregoing experimental observations can be expressed in one formula: The
- 6. Note that the field dB in the Biot-Savart law is the
- 7. Magnetic Field of a Thin Straight Wire Using the Biot-Savart law
- 8. Magnetic Field of an Infinitely Long Wire For a very long
- 9. Magnetic Field around a Wire Because of the symmetry of the
- 10. Magnetic Force Between Two Parallel Conductors Two long, straight, parallel wires
- 11. Ampere’s Law The line integral of B*ds around any closed path
- 12. Example for the Ampere’s Law
- 13. Magnetic Field of a Solenoid A solenoid is a long wire
- 14. Cross-sectional view of an ideal solenoid, where the interior magnetic field
- 15. Magnetic Flux The magnetic flux through an area element dA is
- 16. Magnetic flux through a plane lying in a magnetic field The
- 17. Gauss’s Law in Magnetism The net magnetic flux through any closed
- 18. The magnetic field lines of a bar magnet form closed loops.
- 19. Displacement Current There is a charging capacitor, with current I two
- 20. This contradiction is resolved by introducing a new quantity – the
- 21. General form of Ampere’s Law So considering the displacement current, we
- 22. So the electric flux through S2 is So the electric flux
- 23. Then the displacement current through S2 is Then the displacement current
- 24. Units in Si Magnetic field B T= N*s/(C*m)
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