Question

a wire is 4m long, 0.6mm in diameter and has resistance of 10. calculate its resistivity

Answer 1

hey mate!!

resistivity is denoted as rho

rho = R x A /l

rho = 10×3.14 × 0.3 ×10^-3 × 0.3×10^-3/4

rho =7.06 ohm-m

hope it will help you..

#Phoenix

Answer 2

l = 4m.

d = 0.6 mm

r = 0.3 mm

= 3×10^-4 m

R = 10 ohm.

R = rho ×l/A

rho = R×A/l

= 10×22×3×10^-4×3×10^-4/4×7

= 7.07 × 10^-8 ohm m.

Cheers.

Answer 3

l = 4m.

d = 0.6 mm

r = 0.3 mm

= 3×10^-4 m

R = 10 ohm.

R = rho ×l/A

rho = R×A/l

= 10×22×3×10^-4×3×10^-4/4×7

= 7.07 × 10^-8 ohm m.

Cheers.