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Drift speed of electrons, when 1.5 A of current flows in a copper wire of cross section 5 mm2, is v, if the electron density in copper is 9 1028/m3 the value of v in mm/s is close to (take charge of electron to be=1.6 10−19C)

a.

0.2

b.

3

c.

2

d.

0.02


Question ID - 50080 | Top Ranker Answer | SaraNextGen

Drift speed of electrons, when 1.5 A of current flows in a copper wire of cross section 5 mm2, is v, if the electron density in copper is 9 1028/m3 the value of v in mm/s is close to (take charge of electron to be=1.6 10−19C)

a.

0.2

b.

3

c.

2

d.

0.02

1 Answer - 5876 Votes

3537

Answer Key : (a) -

I=neAVd

 Vd=

=0.02m/s



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