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AA = (AX Ах (a) O increasing RHR-2 в Application of Lenz's law RHR-1 R #E Equivalent circuit (b) Figure 23.11 (a) A motional emf = Btv is induced between the rails when this rod moves to the right in the uniform magnetic field. The magnetic field B is into the page, perpendiculer to the moving rod and rails and, hence, to the area enclosed by them. (b) Lenz's law gives the directions of the induced field and current, and the polarity of the induced emf. Since the flux is increasing, the induced field is in the opposite direction, or out of the page. RHR-2 gives the current direction shown, and the polarity of the rod will drive such a current. RHR-1 also indicates the same polarity for the rod. (Note that the script E symbol used in the equivalent circuit at the bottom of part (b) represents emf.)

AA = (AX Ах (a) O increasing RHR-2 в Application of Lenz's law RHR-1 R #E Equivalent circuit (b) Figure 23.11 (a) A motional emf = Btv is induced between the rails when this rod moves to the right in the uniform magnetic field. The magnetic field B is into the page, perpendiculer to the moving rod and rails and, hence, to the area enclosed by them. (b) Lenz's law gives the directions of the induced field and current, and the polarity of the induced emf. Since the flux is increasing, the induced field is in the opposite direction, or out of the page. RHR-2 gives the current direction shown, and the polarity of the rod will drive such a current. RHR-1 also indicates the same polarity for the rod. (Note that the script E symbol used in the equivalent circuit at the bottom of part (b) represents emf.)

College Physics
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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The 12.0 cm long rod as shown moves at 4.00 m/s.
What is the strength of the magnetic field if a 95.0 V emf is
induced?

AA = (AX Ах (a) O increasing RHR-2 в Application of Lenz's law RHR-1 R #E Equivalent circuit (b) Figure 23.11 (a) A motional emf = Btv is induced between the rails when this rod moves to the right in the uniform magnetic field. The magnetic field B is into the page, perpendiculer to the moving rod and rails and, hence, to the area enclosed by them. (b) Lenz's law gives the directions of the induced field and current, and the polarity of the induced emf. Since the flux is increasing, the induced field is in the opposite direction, or out of the page. RHR-2 gives the current direction shown, and the polarity of the rod will drive such a current. RHR-1 also indicates the same polarity for the rod. (Note that the script E symbol used in the equivalent circuit at the bottom of part (b) represents emf.)
Transcribed Image Text:AA = (AX Ах (a) O increasing RHR-2 в Application of Lenz's law RHR-1 R #E Equivalent circuit (b) Figure 23.11 (a) A motional emf = Btv is induced between the rails when this rod moves to the right in the uniform magnetic field. The magnetic field B is into the page, perpendiculer to the moving rod and rails and, hence, to the area enclosed by them. (b) Lenz's law gives the directions of the induced field and current, and the polarity of the induced emf. Since the flux is increasing, the induced field is in the opposite direction, or out of the page. RHR-2 gives the current direction shown, and the polarity of the rod will drive such a current. RHR-1 also indicates the same polarity for the rod. (Note that the script E symbol used in the equivalent circuit at the bottom of part (b) represents emf.)
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