The number density offree electrons in a copper conductor estimated in – InterviewSolution

1.	The number density offree electrons in a copper conductor estimated in Example 3.1 is 8.5× 1028 m−3. How long does anelectron take to drift from one end of a wire 3.0 m long to its otherend? The area of cross-section of the wire is 2.0 × 10−6m2 and itis carrying a current of 3.0 A.
Answer» The number density of free electrons in a copper conductor estimated in Example 3.1 is 8.5 × 10²⁸ m⁻³. How long does an electron take to drift from one end of a wire 3.0 m long to its other end? The area of cross-section of the wire is 2.0 × 10⁻⁶m² and it is carrying a current of 3.0 A.

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