2054Lecture8

# 2054Lecture8 - Magnetic Forces Magnetic Topics of...

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Unformatted text preview: Magnetic Forces Magnetic Topics of Discussion Topics Properties of the Magnetic Field Magnetic Force & Right–hand Rule Magnetic force on a Current Carrying Magnetic Wire Wire Fundamental Forces Properties of the Magnetic Field Properties The magnetic field is a manifestation of The the electric field, that is charges in motion. the No magnetic charges. Like poles repel. Unlike poles attract. Magnetic field lines leave the north pole Magnetic and enter the south pole. and Magnetic Force Magnetic The magnitude of the magnetic force F The magnetic experienced by a moving charge q at speed v in a magnetic field B is given by F = qvB sin θ where θ is the angle between the velocity and where the direction of the magnetic field. The unit of the magnetic field is the Tesla=Weber/m2 in SI Tesla=Weber/m or the Gauss in cgs. Gauss The Magnetic Force on a Current Carrying Wire on Let I be the current carried by a wire of Let length L. Then the force acting on the Then wire due to an external magnetic field B is given by given F = ILB sin θ where θ is the angle between the direction where in which the current travels along the wire and the magnetic field B. The Fundamental Forces The Characteristics/F Gravitational orce Attractive Repulsive Charge Yes No Mass Electric Yes Yes Magnetic Yes Yes Positive & No Negative Magnetic Charges Charges ...
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## This note was uploaded on 02/10/2010 for the course PHY 2053 taught by Professor Hardy during the Spring '10 term at University of Southern Maine.

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