A metal has 9 \times 10^{28} conduction electrons per {m}^{3} and its resistivity is 1 \times 10^{-8} Ω {m}. If the drift speed of an electron in the metal is 1.6 \times 10^{6} {m} \/ {s} then its mean free path is ( mass of electron =9 \times 10^{-31} {kg} and charge of electron =1.6 \times 10^{-19} {C} )

TS EAMCET 19-July-2022 Shift 1 Solved Paper

Section: Physics

Question : 106 of 160

Marks: +1, -0

A metal has 9×1028 conduction electrons per m3 and its resistivity is 1×10−8Ωm. If the drift speed of an electron in the metal is 1.6×106m∕s then its mean free path is ( mass of electron =9×10−31kg and charge of electron =1.6×10−19C )

55.5nm
78.0nm
40.0nm
62.5nm

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