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Physics 1 Problem Solutions 234

Physics 1 Problem Solutions 234 - 230 Chapt 30 Currents...

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230 Chapt. 30 Currents Causing Magnetic Fields EQUILATERAL TRIANGLE of side a . The angles at the corners of the triangle are all 60 , of course. HINT: Draw a diagram. i) Which way must the net force on any one of the wires point? HINT: Exploit symmetry. ii) What is the magnitude of the force per unit length f on any one of the wires? a) (i) Away from the triangle center. (ii) f = μ 0 I 2 2 πa × 3 . b) (i) Away from the triangle center. (ii) f = μ 0 I 2 2 πa × 2 . c) (i) To the triangle center. (ii) f = μ 0 I 2 2 πa × 3 . d) (i) To the triangle center. (ii) f = μ 0 I 2 2 πa × 3 2 . e) (i) To the triangle center. (ii) f = μ 0 I 2 2 πa . Full-Answer Problems 030 qfull 00100 3 3 0 tough math: finite straight wire magnetic field 1. A thin, straight wire of length L carries current I . The current comes out of nowhere and goes into nowhere which is really unrealistic. a) Draw a diagram of the system. Describe the magnetic field lines everywhere. b) Find the expression for the magnetic field at a point a distance R away from the CENTER of the wire along a line perpendicular to the wire.
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