chap23solns1

chap23solns1 - Faradays Law and Inductance CHAPTER OUTLINE...

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Faraday’s Law and Inductance CHAPTER OUTLINE 23.1 Faraday’s Law of Induction 23.2 Motional emf 23.3 Lenz’s Law 23.4 Induced emfs and Electric Fields 23.5 Self-Inductance 23.6 RL Circuits 23.7 Energy Stored in a Magnetic Field 23.8 Context Connection The Repulsive Model for Magnetic Levitation SOLUTIONS TO RELEVANT PROBLEMS FOR FINAL EXAM Section 23.1 Faraday’s Law of Induction Section 23.3 Lenz’s Law P23.1  B t B A  t 2.50 T 0.500 T 8.00 10 4 m 2 1.00 s 1 N s 1 T C m 1 V C 1 N m 1.60 mV and I loop R 1.60 mV 2.00 0.800 mA P23.2  N BA cos t NB r 2 cos f cos i t 25.0 50.0 10 6 T 0.500 m 2 cos180  cos 0 0.200 s  9.82 mV
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P23.4 dBA  dt 0.500 0 nA dI dt 0.500 0 n r 2 2 I t (a) I ring R 0 n r 2 2 2 R I t (b) B 0 I 2 r 1 0 2 n r 2 2 4 r 1 R I t (c) The coil’s field points downward, and is increasing, so . B ring points upward I FIG. P23.4 P23.5 [ Nota bene: You do NOT need to be able to compute magnetic flux via integration, but just recognize that Φ B = BAcos θ is equivalent to Φ B = BdA , etc. ] (a) d B B d A 0 I 2 x Ldx : B 0 IL 2 dx x h h w 0 IL 2 ln h w h (b)  d B dt d dt 0 IL 2 ln h w h 0 L 2 ln h w h dI dt 4 10 7 T mA 1.00 m 2 ln 1.00 10.0 1.00 10.0 A s 4.80 The long wire produces magnetic flux into the page through the rectangle, shown by the first hand in the figure to the right.
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This note was uploaded on 01/30/2012 for the course PHYS 1B 1B taught by Professor Grosmain during the Winter '11 term at UCSD.

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chap23solns1 - Faradays Law and Inductance CHAPTER OUTLINE...

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