Drift speed of electrons

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

Problem

Drift speed of electrons, when

1.5 \text{ A}

of current flows in a copper wire of cross section

5 \text{ mm}^2

, is

v

. If the electron density in copper is

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

the value of

v

\text{mm/s}

close to (Take charge of electron to be

= 1.6 \times 10^{-19} \text{ C}

) (1)

0.02

(2)

3

(3)

2

(4)

0.2