Physics 2213
Homework #7
Spring 2010
Read:
Chapter 27, intro., sections 27.17
Basic Ideas:
Magnetic Fields & Magnetic Forces on Moving Charges & Electric Currents
Magnetic Field Line Model
Magnetic Forces & Torques on Electric Current Loops
Magnetic Dipoles
Analogy between Electric Current Loops & Permanent Magnets
Electric Potential & Potential Energy
Math Skills:
3D Vector Geometry, including Vector Cross Product
Algebra, Trigonometry, Calculus
Learning Goals:
(Be sure you understand where and how each goal in each assignment applies to our
homework, discussion, lecture, and lab activities.)
*
Relate and calculate magnetic forces, magnetic fields, and velocities of moving electrically
charged particles—directions and magnitudes—using the Lorentz Force Law.
*
Determine the trajectories taken by charged particles moving under the influence of
magnetic forces, given the geometry of the field and the initial particle velocities.
*
Relate and calculate magnetic fields and magnetic forces acting on electric currents.
*
Explain and show how to determine appropriate field directions and calculate physical
quantities involved in applications involving magnetic fields and forces—mass
spectrometer, velocity selector, cyclotron, magnetic rail gun, aurora, Earth's magnetic field.
For extra practice:
Chap. 27:
Q's #Q27.1, 3, 4, 6, 7, 10, 12, 1416, 21
(not quizzed or turned in)
E's & P's: #27.3, 5, 15, 25, 39, 45a
To be prepared for a Quiz on WednesdayFriday, Mar. 1719, at your 2nd weekly Discussion
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 Spring '10
 Charge, Current, Force, Work, Magnetic Force, Magnetic Field

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