When a potential difference of 2 volt is applied across the ends of a wire of 5 m length, a current of 1 A is found to flow through it.Calculate the resistance across the ends of the wire if it is tripled on itself.
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Answer:
Drift velocity v
d
=
neA
I
=
neA
V/R
=
neA(
A
ρL
)
V
=
neρL
V
Thus, drift velocity is independent of diameter so it does not change.
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