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Last Updated On 23-10-2022 - By Sara

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 :-

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



Next Question :

The three sides of triangular field are 20 m, 21 m and 29 m long. The area of the field is 

(a)

210 sq. cm

(b)

215 sq. cm

(c)

230 sq. cm

(d)

None of these


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