Lecture%2020%202220%20Spring%202009

Lecture%2020%202220%20Spring%202009 - Announcements and...

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1 Announcements and Reminders Homework 12 is due tomorrow. HW 13 is due Friday. There is a quiz in recitation this week. Turn in a piece of paper with name and responses if you don’t have your clicker with you today, or if you haven’t given me your clicker ID yet Biot-Savart Law 2 4 ˆ I o μd d πr sr B o = 4 x 10 -7 T . m / A 2 4 ˆ I o B (permeability of free space) Example Each of two long straight parallel wires separated by a distance of 16 cm carries a current of 17 A in the same direction. What is the magnitude of the resulting magnetic field at a point that is 12 cm from each wire? B for a Curved Wire Segment Find the field at point O due to the wire segment I and R are constants will be in radians 4 I o μ B θ πR Example B for a Circular Loop of Wire Consider the previous result, with = 2 This is the field at the center of the loop 2 4 4 2 I I I o o o μ μ μ B θπ πR πR R
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2 B for a Circular Current Loop The loop has a radius of R and carries a steady current of I
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This document was uploaded on 09/30/2009.

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Lecture%2020%202220%20Spring%202009 - Announcements and...

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