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19 BSuperposition(1)

19 BSuperposition(1) - Project Drafts(instructions also on...

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Craig Ogilvie Project Drafts (instructions also on BB) § SafeAssign via BB, one upload per group upload to "draft project TA name", by Tue 1 Mar, 8am Plagiarism report => go back to this link after a few hours check that you have cited all your sources edit and upload again 11

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Craig Ogilvie 22 Summary Lecture 18 moving charge 1 generates B-field moving charge 2 experiences force in B-field This symmetry is a key part of a coherent picture of B-fields 2 0 ˆ 4 r r l d i B d × = π μ m/A Tesla 10 4 constant ty permeabili P point to charge from r unit vecto ˆ ˆ 4 7 - 0 2 0 × = = × = π μ π μ r r r v q B × = wire r r l d i B 2 ˆ 4 0 π μ
Craig Ogilvie 33 Goals for Today § Superposition (adding) of B-fields § Pre-lecture video, integrating along straight wire Total B-field § Practice with directions of B-fields i R B π μ 2 0 =

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Craig Ogilvie 44 Question: B-field wire, 1st round 0.2m § Infinite wire, if the B-field at point P is 0.1T, how strong is the field at O? i P 0.4m O 1. 0.025 T 2. 0.05 T 3. 0.1 T 4. 0.2 T 1 of 300
Craig Ogilvie 55 Question: B-field wire, 2nd round 1 2 3 4 0% 0% 0% 100% 0.2m § Infinite wire, if the B-field at point P is 0.1T, how strong is the field at O?

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