zhangreview2

zhangreview2 - 3/19/2009 A magnet or electrical current...

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3/19/2009 1 A magnet or electrical current produces a magnetic field; - Unit: Tesla (T) Magnetic force on a moving charge: Direction: Right hand rule - Point fingers (to the direction of v) - curl (to the direction of B) - Thumb points to the direction of F - Only true for positive charge (reverse for negative charge) sin qvB F v B (into the page in this case) Magnetic force on a current: Direction: Right hand rule Torque on a current loop : angle between B and normal direction of the current plane A: area of the current loop I X X X X X X X X X X X X X X X X X X X X F ) sin( BIl F ) sin( BIA I No torque Maximum torque
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3/19/2009 2 r A charged particle moving in an external magnetic field with Circular motion Cyclotron frequency: ; Period: Magnetic field generated by a current (Ampere’s law): Magnetic force between two currents B v qB mv r r v v r T 2 r I B 2 0 space
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This note was uploaded on 09/13/2009 for the course PHY 102 taught by Professor Luo during the Spring '08 term at SUNY Buffalo.

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zhangreview2 - 3/19/2009 A magnet or electrical current...

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