chp33_5 - PHY2061 R D Field Ampere's Law Examples...

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PHY2061 R. D. Field Department of Physics chp33_5.doc University of Florida Ampere’s Law Examples Example ( Infinite Straight Wire with radius R ): An infinitely long straight wire has a circular cross section of radius R and carries a uniform current density J along the wire. The total current carried by the wire is I . What is the magnitude of the magnetic field inside and outside the wire? Answer: Br kI r krI R out in () = = 2 2 2 . Example ( Infinite Solenoid ): An infinitely long thin straight wire carrying current I is tightly wound into helical coil of wire ( solenoid ) of radius R and infinite length and with
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This note was uploaded on 05/31/2011 for the course PHY 2061 taught by Professor Fry during the Spring '08 term at University of Florida.

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