Question

Please solve with workout....​

Answer 1

Answer:

I don't know

pls forgive me

Answer 2

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Answer:

122.72 m

Explanation:

Given :

Resistivity ρ = 1.6 × 10⁻⁸ Ω m

Resistance R = 10 Ω

Diameter d = 0.5 mm

= > Radius r = 0.25 mm = 0.25 × 10⁻³ m = 2.5 × 10⁻⁴ m

= > Area A = 6.25 π × 10⁻⁸ m²

We are asked to find length L :

We know :

R = ρ ( L ) / ( A )

= > L = ( R × A ) / ρ

Putting values here we get :

= > L = ( 10 × 6.25 π × 10⁻⁸ ) / 1.6 × 10⁻⁸ m

= > L = 62.5 π / 1.6

= > L = 122.72 m

Hence we get required answer!