Lecture%2024%202220%20Spring%202009

Lecture%2024%202220%20Spring%202009 - Reminders and...

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1 Reminders and Announcements Homework 15 is due Friday Exam 2 is next Monday Chs. 27-30 Help Room Hours (Physics 117): M 4-8 pm, T 3-6:30, W 3-6:30, R 4:30-8, F 2-6 Faraday’s Law – Statements • Faraday’s law of induction states that “the emf induced in a circuit is directly proportional to the time rate of change of the magnetic flux through the circuit” Mathematically, B d ε dt Induced emf and Electric Fields An electric field is created in the conductor as a result of the changing magnetic flux Even in the absence of a conducting loop, a changing magnetic field will generate an electric field in empty space This induced electric field is nonconservative Unlike the electric field produced by stationary charges Induced emf and Electric Fields, cont. The emf for any closed path can be expressed as the line integral of E . d s over the path • Faraday’s law can be written in a general form: B d d dt Es
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This document was uploaded on 09/30/2009.

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Lecture%2024%202220%20Spring%202009 - Reminders and...

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