Example 1 · difficulty 2/5
A steady current of 1.36 A flows through a copper wire of uniform cross-sectional area 1.0 × 10⁻⁶ m². If the free electron density of copper is 8.5 × 10²⁸ m⁻³ and e = 1.6 × 10⁻¹⁹ C, the drift speed of electrons in the wire is:
- A. 1.0 × 10⁻⁴ m s⁻¹
- B. 5.0 × 10⁻⁵ m s⁻¹
- C. 1.0 × 10⁻³ m s⁻¹
- D. 1.0 × 10⁻² m s⁻¹