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22 Pages

### 25_InstructorSolutions

Course: PHY 111, Spring 2008
School: Aberystwyth University
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Word Count: 9784

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RESISTANCE, CURRENT, AND ELECTROMOTIVE FORCE 25 25.1. 25.2. IDENTIFY: I = Q / t . SET UP: 1.0 h = 3600 s EXECUTE: Q = It = (3.6 A)(3.0)(3600 s) = 3.89 104 C. EVALUATE: Compared to typical charges of objects in electrostatics, this is a huge amount of charge. IDENTIFY: I = Q / t . Use I = n q vd A to calculate the drift velocity vd . SET UP: EXECUTE: n = 5.8 1028 m -3 . (a) I = q = 1.60 10-19 C . 420 C Q =...

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