question_answer

If N, e, \[\tau \]and m are representing electron density, charge, relaxation time and mass of an electron respectively, then the resistance of wire of length l and cross-sectional area A is given by

A) \[\frac{ml}{N{{e}^{2}}{{A}^{2}}\tau }\]

B) \[\frac{2m\tau A}{N{{e}^{2}}l}\]

C) \[\frac{N{{e}^{2}}\tau A}{2ml}\]

D) \[\frac{N{{e}^{2}}}{2m\tau l}\]