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Understanding Magnetic Fields from Currents and Their Applications in Electromagnetism

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This chapter explores the fundamental concepts of magnetic fields generated by electric currents, detailing how permanent magnets and current-carrying conductors produce magnetic fields. It introduces the right-hand rule for visualizing magnetic field directions and examines the forces between parallel currents, including the effects of opposite current directions. The chapter also covers the magnetic field of current loops and solenoids, comparing their characteristics to that of bar magnets, and discusses practical applications of these magnetic phenomena in technology and engineering.

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Understanding Magnetic Fields from Currents and Their Applications in Electromagnetism

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  1. CHAPTER 22 Magnetic Forces and Magnetic Fields (Magnetic Fields from Currents)

  2. PRODUCING A MAGNETIC FIELD Permanent Magnet Current

  3. MAGNETIC FIELD DUE TO CURRENTS Right hand rule

  4. VIEW FROM THE TOP

  5. VIEW FROM THE SIDE

  6. FORCE BETWEEN PARALLEL CURRENTS What if the currents are in opposite directions?

  7. Field and Force

  8. MAGNETIC FIELD OF A LOOP OF CURRENT

  9. COIL AND BAR MAGNET The magnetic field produced by a coil is almost identical to that of a bar magnet.

  10. SOLENOIDS

  11. SOLENOIDS n: Number of turns per unit length Unit of n: m-1=turns/m

  12. B FIELD INSIDE A SOLENOID

  13. APPLICATIONS

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