Given:
Current, I = 6.5 A
Number of free electrons per cubic meter, n = 8.5 x 10^28 m^-3
Charge of an electron, e = 1.6 x 10^-19 C
Cross-sectional radius, r = 0.95 mm = 0.95 x 10^-3 m
Drift velocity, v = I / (n * e * A)
Area of cross-section, A = πr^2
A = π *
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