51_Ch28_B_fld_Ampere'sLaw

51_Ch28_B_fld_Ampere'sLaw - B field of current element...

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Unformatted text preview: B field of current element (sec. 28.2) B field of current-carrying wire (sec. 28.3) Force between conductors (sec. 28.4) B field of circular current loop (sec. 28.5) Amperes Law (sec. 28.6) Applications of Amperes Law (sec. 28.7) C 2009 J. Becker Source of Magnetic Field Ch. 28 Learning Goals- we will learn: Ch 28 How to calculate the magnetic field produced by a long straight current- carrying wire. How to calculate the magnetic field produced by a circular current-carrying loop of wire. How to use Amperes Law to calculate the magnetic field caused by symmetric current distributions. (a) Magnetic field caused by current element d l. (Similar to B field lines caused by a moving charge +q.) (b) Here the current is moving into the screen. Magnetic field produced by a straight current-carrying wire of length 2a. The direction of B at point P is into the screen. x o Law of Biot and Savar t dB = o / 4 (I d L x r ) / r 3 Magnetic field around a long, straight conductor. The field lines are circles, with directions determined by the r ight-hand r ule . Parallel conductors carrying currents in the same...
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51_Ch28_B_fld_Ampere'sLaw - B field of current element...

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