lecture22 - Biot-Savart Law, Ampres Law Text 30.2, 30.3...

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Biot-Savart Law, Ampère’s Law Text 30.2, 30.3 •Fields and forces for straight wires •Ampère’s Law Practice: Chapter 30, problems 17, 21, 23, 25, 29. Parallel Long Wires: Parallel Long Wires: Find: Force on segment ab L I 1 d (Take I 1 = 20A, I 2 =30A, d=0.01m, L=1.5m) a b 2
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Quiz Quiz I 1 2 The two long wires shown cross at right angles. How will the top (red) wire move when the current is turned on? For any closed path : Ampère’s Law (an integral theorem) encircled o path I µ = ds B “Circulation” of encircled current o × = B The current calculated this way flows through the surface bordered by the path. direction of integration positive current is out of the page through the shaded surface
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C 1 2 3 I B Quiz: Long Straight Wire Quiz: Long Straight Wire On which of the curves C 1 , C 2 , and C 3 is path ds B i) smallest ii) largest ? Example: Long Straight Wire
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This note was uploaded on 12/03/2009 for the course CHEMISTRY 1E03 taught by Professor Britz during the Spring '09 term at McMaster University.

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lecture22 - Biot-Savart Law, Ampres Law Text 30.2, 30.3...

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