Question

plz solve this numerical. it's of class 10 of physics of the chapter electricity.

Answer 1

Hey 

Resistance ( R) = 26 Ω

length (l) = 1 m 

Temperature (T) = 20°C = 293.15 K 

Diameter = 0.3 mm = 0.3 x 10⁻³ m 

Radius = 0.3/2  x 10⁻³ = 0.15 x 10⁻³ m 

Area ( A) = π r²

= 3.14 x 0.15 x 0.15 x 10⁻⁶

= 0.7065 x 10⁻⁶m²

Resistivity(ρ) = ?

R = ρl/A 

ρ = R X A / l 

ρ = 26 x 0.7065  x 10⁻⁶ / 1 

ρ = 1.8369 ohm / m 

Answer 2

Answer:

The resistivity of the metal at 20°C is

1.84 x 10 rest to the power -6m