ch26-p031 - 31. (a) The current in the block is i = V/R =...

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Unformatted text preview: 31. (a) The current in the block is i = V/R = 35.8 V/935 Ω = 3.83 × 10–2 A. (b) The magnitude of current density is J = i/A = (3.83 × 10–2 A)/(3.50 × 10–4 m2) = 109 A/m2. (c) vd = J/ne = (109 A/m2)/[(5.33 × 1022/m3) (1.60 × 10–19 C)] = 1.28 × 10–2 m/s. (d) E = V/L = 35.8 V/0.158 m = 227 V/m. ...
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