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JEEMAIN-2015
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Q)
When 5V potential difference is applied across a wire of length
0.1
m
, the drift speed of electrons is
2.5
×
10
−
4
m
s
−
1
. If the electron density in the wire is 48 \times 10^{-3}$, the resistivity of the material is close to :
1.6
×
10
−
5
Ω
m
1.6
×
10
−
8
Ω
m
1.6
×
10
−
7
Ω
m
1.6
×
10
−
6
Ω
m
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