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Unformatted text preview: Magnetism Exam III Exam III Exam III Magnetism Recall: Unit • The magnetic field (Bfield) is measured in Tesla – 1 T = 1 N/A·m. – (we will get back to the definition of 1 Tesla) • Sometimes used: the gauss (G): 1 G = 104 T Recall: Magnetic Field Due to a Long Straight Wire The field is inversely proportional to the distance from the wire: The constant μ is called the permeability of free space , and has the value: Solenoids and Electromagnets A solenoid is a long coil of wire . If it is tightly wrapped, the magnetic field in its interior is almost uniform : Solenoids and Electromagnets If a piece of iron is inserted in the solenoid, the magnetic field greatly increases. Such electromagnets have many practical applications. Recall: The Force on a Charged Particle Moving in a Magnetic Field Slide 2446 The force is perpendicular to the plane spanned by B and v Defines the Tesla! Force on an Electric Current in a Magnetic Field; A magnet exerts a force on a currentcarrying wire. The direction of the force is given by a righthand rule.righthand rule....
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This note was uploaded on 01/15/2012 for the course PHY 101 taught by Professor Schwarz during the Fall '08 term at Syracuse.
 Fall '08
 Schwarz
 Magnetism

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