AP EAPCET 04-Jul-2022 Shift 2 Paper

Section: Physics

Question : 107 of 160

Marks: +1, -0

An electron takes 40×103s to drift from one end of a metal wire of length 2m to its other end. The area of cross-section of the wire is 4mm2 and it is carrying a current of 1.6A. The number density of free electrons in the metal wire is

8×1028m−3
6×1028m−3
4×1028m−3
5×1028m−3

Validate

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