Question

If 10 m long manganin wire, 0.13 cm in diameter has a resistance of 3.4 ohms. What is the conductivity of the material?​

Answer 1

Answer:

Given : R=2Ω l=1 m d=0.4 mm =0.0004 m

Cross section area of wire A=

4

πd

2

=

4

π×(0.0004)

2

=1.256×10

−7

m

2

Resistivity of the material ρ=

l

RA

∴ ρ=

1

2×1.256×10

−7

=2.514×10

−7

Ωm

Answer 2

$\color{pink}{Answer:}$

2.22 × 10⁶ ohm⁻¹.

Step-by-step explanation:

The conductivity of the wire is 2.22 × 10⁶ ohm⁻¹.

Both (a) resistivity & (b) conductivity are shown in above attachment.

$\color{purple}{Hope it helps you}$