prove that mass *length / number of free electrons square tau area of cross section
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Salty prohibition, the widow remarriage act was correct from a social point of view, but the Indians thought that it was an interference in their lifestyle and hence, they were dissatisfied. These are the social causes behind the struggle of 1857.
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ANSWER
Given : M=0.060 kg A=10
−6
m
2
ρ=5000 kg/m
3
I=16 A
Number of atoms per unit volume
V
n
=
VM
mN
A
=
M
ρN
A
∴
V
n
=
0.060
5000×6×10
23
=5×10
23
atoms per unit volume
As one Cu atom contributes one free electron, thus electron density n
e
=n=5×10
28
electrons per unit volume
Current density J=
A
I
=
10
−6
16
=1.6×10
7
A/m
2
Drift velocity v
d
=
en
e
J
=
1.6×10
−19
×5×10
28
1.6×10
7
=0.002 m/s =2 mm/s
thank
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