Prozorov_06 - PHYSICS 222 Introduction to Classical Physics...

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PHYSICS 222 Introduction to Classical Physics II Prof. Ruslan Prozorov Iowa State University Fall 2011 LECTURE 6 electric current. Drude theory. resist ance & resist ivity Ohm’s law.
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conductor in an electric field 2 September 2011 PHYS222 - Lecture 6 - Prof. Ruslan Prozorov - Iowa State University 2 (electro)static transient period at t=0 – turn on electric field
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removing build-up charges from the ends 2 September 2011 PHYS222 - Lecture 6 - Prof. Ruslan Prozorov - Iowa State University 3
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electric current 2 September 2011 PHYS222 - Lecture 6 - Prof. Ruslan Prozorov - Iowa State University 4 (need extra work to keep charges apart)   C A ampere s    
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estimate the drift velocity 2 September 2011 PHYS222 - Lecture 6 - Prof. Ruslan Prozorov - Iowa State University 5 Suppose we have a wire of 1 mm in diameter currying electric current of 1 A. Estimate the value of v d ? 1 A means that total of 1 C of charge crosses the area in 1 s. Each electron carries e = -1.6×10 -19 C and typical concentration of electrons in good metals: n=5x10 28 1/m 3     2 1 s 1 C 4 d d Q v e n
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This note was uploaded on 11/14/2011 for the course PHYS 5863005 taught by Professor Meyer during the Fall '09 term at Iowa State.

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Prozorov_06 - PHYSICS 222 Introduction to Classical Physics...

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