Lectures_Lect15 - Physics 212 Lecture 15 Slide Physics 212 Lecture 15 Slide 1 Physics 212 Physics 212 Lecture 15 Lecture 15 Amperes Law Phys ic s

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Unformatted text preview: Physics 212 Lecture 15, Slide Physics 212 Lecture 15, Slide 1 Physics 212 Physics 212 Lecture 15 Lecture 15 Amperes Law Phys ic s 212 Le c ture 15, S lide Phys ic s 212 Le c ture 15, S lide 2 :05 Infinite current-carrying wire Infinite current-carrying wire R I B o 2 = R B d B Bd d B 2 = = = LHS: LHS: I I enclosed = RHS: RHS: General Case General Case Phys ic s 212 Le c ture 15, S lide Phys ic s 212 Le c ture 15, S lide 3 :08 Practice on Enclosed Currents Practice on Enclosed Currents Checkpoint 1a Checkpoint 1b Checkpoint 1c For which loop is B d l the greatest? A. Case 1 B. Case 2 C. Same I enclosed enclosed = I = I I enclosed enclosed = I = I For which loop is B d l the greatest? A. Case 1 B. Case 2 C. Same I enclosed enclosed = I = I I enclosed enclosed = 0 = 0 For which loop is B d l the greatest? A. Case 1 B. Case 2 C. Same I enclosed enclosed = 0 = 0 I enclosed enclosed = 0 = 0 Phys ic s 212 Le c ture 15, S lide Phys ic s 212 Le c ture 15, S lide 4 :22 Checkpoint 2a Cylindrical Symmetry Cylindrical Symmetry Enclosed Current = 0 Enclosed Current = 0 X X X X Check cancellations Check cancellations An infinitely long hollow conducting tube carries current I in the direction shown. What is the direction of the magnetic field inside the tube? A. clockwise B. counterclockwise C. radially inward to the center D. radially outward from the center E. the magnetic field is zero Phys ic s 212 Le c ture 15, S lide Phys ic s 212 Le c ture 15, S lide 5 Line Line Integrals Integrals I into screen :12 d B enc I Phys ic s 212 Le c ture 15, S lide Phys ic s 212 Le c ture 15, S lide 6 Amperes Law Amperes Law dl B dl B dl B :14 enc o I d B = Phys ic s 212 Le c ture 15, S lide Phys ic s 212 Le c ture 15, S lide 7 dl B dl B dl B :16 Amperes Law Amperes Law enc o I d B = Phys ic s 212 Le c ture 15, S lide...
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Lectures_Lect15 - Physics 212 Lecture 15 Slide Physics 212 Lecture 15 Slide 1 Physics 212 Physics 212 Lecture 15 Lecture 15 Amperes Law Phys ic s

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