slides11all - C 2 V Q 1 Q 2-Q 1-Q 2 KC 2 C 1(a(b Almost...

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Previous Lecture B exerts force on moving charges: F = I l × B d F = Id l × B F = q v × B Moving charges ( i.e, I ) create B –p
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Today Hour Test 1 Spiral motion along B Torque on current loop Biot Savart Law –p
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Comments on HT-1 Very similar to Practice Exam Scores were low –p
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Results of HT-1 mean 66 range 31 - 96 Score Number of Students –p
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Results of HT-1 mean 66 range 31 - 96 Score Number of Students A B C –p
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Problem 1, HT-1 1 4 2 2 I 1 I 3 I 2 1V 8V 9V Nearly all did well (18 or 20 points). –p
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Problem 2, HT-1 R P (x=0,y=0,z) y z x Q θ θ P dQ x y z a r This question was a lot like one of the homework questions. Many did poorly (mean 10). –p
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Problem 3, HT-1 R 0 r Very long distance L Very broad distribution (mean 11). –p
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Problem 4, HT-1 KC 1
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Unformatted text preview: C 2 V +Q 1 +Q 2-Q 1-Q 2 KC 2 C 1 (a) (b) Almost identical to the Practice Exam. – p. Problem 5, HT-1 R C S V I Q Some confusion on part (c), showing that the expressions given for Q ( t ) and I ( t ) satisy the loop equations. Just plug in! – p. 1 Circular Motion of e − in B Fig. 27-17 – p. 1 Some Astrophysics (1) Solar wind (protons) and earth’s magnetic feld: Fig. 27-19a – p. 1 Some Astrophysics (2) The solar wind changes the earth’s magnetic feld. – p. 1 Aurora Borealis – p. 1 Torque on Current Loop Fig. 27-21a – p. 1 Simple dc motor Figs. 27-24 & 27-25 – p. 1...
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slides11all - C 2 V Q 1 Q 2-Q 1-Q 2 KC 2 C 1(a(b Almost...

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