Question

The resistivity of copper at room temperature is
1.7 x 10^-8 Nm. If the free electron density of copper
is 8.4 x 10^28 m^-3, find the relaxation time for the
free electrons of copper. Given me = 9.11 x 10^-31 kg
and e = 1.6 x 10^-19 C.
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Answer 1

Answer:

The resistivity of copper at room temperature is 1.7 x 10-8 ohm meter. If the density of mobile electrons is 8.4 x 1028 m3, the relaxation time for the free electrons in copper is (mass of electron 9 x 10-11 kg, charge of electron 1.6 x 10-19 C) A) 2.5 x 10-14 s B) 2.5 x 10-12 s C) 2.5 x 10-10 s D) 2.5 x 10-8 s.

Explanation:

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