The drift velocity of the electrons in a copper wire of length 2 m under the application of a potential difference of 220 V is 0 . 5 m s - 1 . Their mobility ( i n m 2 V - 1 s - 1 )

Step-by-step solution

Drift velocity=mobility× intensity of the electric field or v d = μ E         o r   μ = v d E o r               μ = v d V / l                           ∵ E = V l ∴ μ = 0.5 × 2 220 = 4.5 × 10 − 3   m 2  V − 1  s − 1