A wire of 5.8 m long, 2 mm diameter carries 750 mA current when 22 mV potential difference is applied at its ends. If drift speed of electrons is found `1.7xx10^(-5)` m/s then

Options

A. currenty density is `2.4xx10^(+5)A//m^(2)`
B. current density is `1.6xx10^(+4)A//m^(2)`
C. number of free electrons per unit volume is `2.7xx10^(16)m^(-3)`
D. number of free electrons per unit volume is `8.8xx10^(28)m^(-3)`

Answer

A, D