Chapter 8 Introduction to Magnetic Fields

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Chapter 8 Introduction to Magnetic Fields The Definition of a Magnetic Magnetic Force on a Current-Carrying Example : Magnetic Force on a Semi-Circular Torque on a Current Magnetic force on a Animation : Torques on a Dipole in a Constant Magnetic Charged Particles in a Uniform Magnetic Animation : Charged Particle Moving in a Uniform Magnetic Velocity Mass Problem-Solving Solved Rolling Suspended Conducting Charged Particles in Magnetic Bar Magnet in Non-Uniform Magnetic Conceptual Additional Force Exerted by a Magnetic Magnetic Force on a Current Carrying Sliding Particle Particle Orbits in a Magnetic Force and Torque on a Current Force on a Levitating 8-1Introduction to Magnetic Fields Introduction We have seen that a charged object produces an electric field EGat all points in space.

acting on the straight segment and the semicircular arc. Solution: LetB =Bˆj G and and the forces acting on the straight segment and the semicircular parts, respectively. Using Eq. (8.3.3) and noting that the length of the straight segment is 2R, the magnetic force is F1 G F2 G 1 Fi=×I(2RBˆˆ) (j)=2IRBkˆ G where kˆ is directed out of the page.

  Semicircular