Test2(Yellow)

Test2(Yellow) - Answer Problems 1 through 3 directly on the...

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Answer Problems 1 through 3 directly on the test page, not in the blue book. Problem 1 (15 pts) 1 2 In the simple circuit shown above, wire 1 and wire 2 have the same cross sectional area and electron density, but wire 1 has mobility that is 4 times that of wire 2. (a, 5 pts) How does the drift speed ¯ v 1 of electrons in wire 1 compare to the drift speed ¯ v 2 of electrons in wire 2? A. ¯ v 1 =0 . 25¯ v 2 B. ¯ v 1 =4¯ v 2 C. ¯ v 1 v 2 D. None of these (b, 5 pts) Wire 1 has a mobility of 4 . 5 × 10 3 (m/s)/(N/C), an electron density of 8 . 0 × 10 28 per cubic meter, and a cross sectional area of 7 . 0 × 10 7 m 2 . You measure the conventional current in wire 1 to be 0.3 amperes. What is the electron drift speed in wire 1? Circle your answer below. A. 9 . 5 × 10 7 m/s B. 3 . 3 × 10 5 m/s C. 5 . 4 × 10 24 m/s D. 1 . 3 × 10 4 m/s E. 8 . 4 × 10 6 m/s (c, 5 pts) Circle “T” next to each true statement or “F” for every false statement below regarding the circuit.
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This note was uploaded on 08/18/2010 for the course PY 208M taught by Professor Kolender during the Fall '09 term at N.C. Central.

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Test2(Yellow) - Answer Problems 1 through 3 directly on the...

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