When potential difference is applied across a wire of length

PHYSICS · Single correct · CBSE · Physics · Current Electricity · Current Electricity

Problem

When

5 \text{ V}

potential difference is applied across a wire of length

0.1 \text{ m}

, the drift speed of electrons is

2.5 \times 10^{-4} \text{ ms}^{-1}

. If the electron density in the wire is

8 \times 10^{28} \text{ m}^{-3}

, the resistivity of the material is close to : [Main 2015] (1)

1.6 \times 10^{-6} \Omega \text{ m}

(2)

1.6 \times 10^{-5} \Omega \text{ m}

(3)

1.6 \times 10^{-8} \Omega \text{ m}

(4)

1.6 \times 10^{-7} \Omega \text{ m}