Question

a cylindrical wire is 0.5 m in length 0.5 mm in diameter has a resistance of 2.5 ohms calculate the resistivity and conductivity of The wire​

Answer 1

Answer:

Given, Diameter=0.5mm,resistivity=1.6×10

−8

Ω−m,resistance=10Ω

we know that R=ρ

A

1

⇒1=

ρ

RA

Where A is the area of the cross-section,

=

1.6×10

−8

10×3.14×(

2

0.0005

)

2

=122.7m

Thus the length of the wire is 122.7m

Answer 2

Answer:

p~3.14×10rase to -7 is the correct answer