P27_004 - 4. (a) The magnitude of the current density...

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4. (a) The magnitude of the current density vector is J = i A = i πd 2 / 4 = 4(1 . 2 × 10 10 A) π (2 . 5 × 10 3 m) 2 =2 . 4 × 10 5 A / m 2 . (b) The drift speed of the current-carrying electrons is
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This note was uploaded on 11/12/2011 for the course PHYS 2001 taught by Professor Sprunger during the Fall '08 term at LSU.

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