Question

A copper wire of uniform area of cross-section of 1.54 x 10^-6 m2 carries a current of 3.08 A. The electric field inside the wire, when the resistivity of copper is 1.724 x 10-8 ohm.m, is​

Answer 1

Explanation:

see this attachment image here is your answer!

Answer 2

Answer:

from given data A=2mm

2

ρ=1.7×10

−8

Ωm.

i=1A

V=iR ( from ohms law.)

V=i×

A

ρl

E.l=i×

A

ρl

⇒E=i×

A

ρl

=1A×

2mm

2

1.7×10

−8

Ωm

=8.5×10

−3

m

V

E=8.5×10

−3

m

V