There is current of 0.2 A in a copper wire of area of cross section `10^(-6)m^2`. If the number of free electrons per unit volume is `8.4xx10^(28)m^(-3)`, then the drift speed of electron is about (`e=1.6xx10^(-19)C`)

Options

A. `2xx10^(-5)m//s`
B. `1.5xx10^(-5)m//s`
C. `10^(-5)m//s`
D. `3xx10^(-5)m//s`

Answer

B