Question

Resistance of a wire of material of resistivity 2 x 10^-7 ohm meter, length 10 cm and area of cross section as.0.2cm^2 is

Answer 1

Answer:

Resistance of a wire of material of resistivity 2 x 10^-7 ohm meter, length 10 cm and area of cross section as.0.2cm^2 is 4^9 cm

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Answer 2

Given:

The resistivity of the material of wire, ρ = 2 × 10⁻⁷ Ωm

The length, l = 10 cm = 0.1 m

Area of cross section of wire, A = 0.2 cm² = 2 × 10⁻⁵ m²

To Find:

The resistance of the given wire.

Calculation:

- The resistance is calculated by the formula:

R = ρl/A

⇒ R = (2 × 10⁻⁷ × 0.1) / (2 × 10⁻⁵)

⇒ R = 10⁻² × 0.1

⇒ R = 0.001  Ω

- So, the resistance of the wire is 0.001 Ω.