Mathematics · Current Electricity
What will be the drift velocity vd of the free electrons in a copper wire whose cross-sectional area is A = 1.00 mm2 when the wire carries a current of 1.0 A? Assume that each copper atom contributes 1 electron to the electron gas. (Given: density of copp er = 8.94 × 103 kg/m3, atomic mass of copper = 63.5 u, 1 u = 1.66 × 10-27 kg)
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 17.4 m/s
- 27.4 × 10-7 m/s
- 37.4 × 10-2 m/s
- 47.4 × 10-5 m/s✓
Correct answer
7.4 × 10-5 m/s
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