When 5V potential difference is applied across a wire length 0.1 m, the drift speed of electron is 2.5 ×10^−4 ms^−1. If the electron density in the wire is 8 ×10^28 m^−3 , the resistivity of the material is close to the drift speed of electron is 2.5 ×10^−4 ms^−1. If the electron density in [...]