Question

69)Two wires of same material have length L and 2L and cross?sectional areas 4/
and A respectively. The ratio of their specific resistance would be
ho
O 1:2
O 8:1
O 1:8
O 1:1​

Answer 1

Answer:

Ok

Explanation:

Please check the attached photo

Answer 2

Answer:

Given: Two wires of same material have length L and 2L and cross sectional areas 4/ and A respectively.

We have to find: The ratio of their specific resistance would be

Explanation:

The correct option is O  1:8

- The specific resistance () of a conductor is a property of the material.

- Its value is only affected by the conductor's material and temperature. Its value is independent of the conductor's length and cross-sectional area.

As R = ρ₁/A

R ∝ 1/A

R₁/R₂ = 1₁/A₁ × A₂/1₂

​R₁/R₂ = L/4A × A/2L = 1:8

1₁ = L

1₂ = 2L

A₁ = 4A

A₂ = A

Hence, from the given options, the correct option is 1:8.

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