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An aluminium wire carrying a current has...

An aluminium wire carrying a current has diameter `0.84 mm`. The electric field in the wire `0.49 V//m`. What is
(a) the current carried by the wire?
(b) the potential difference between two points in the wire `12.0 m` apart?
(c) the resistance of a `12.0 m` length of this wire?
Specific resistance of aluminium is `2.75 xx 10^-8 Omega -m. `

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