Two metal wires of same length, same area of cross-section have conductivities of their material \sigma_1 and \sigma_2. If they are connected in series, the effective conductivity is

Correct Answer is : 2σ1σ2σ1+σ2

\frac{\sigma_1 \sigma_2}{\sigma_1+\sigma_2}

\frac{2 \sigma_1 \sigma_2}{\sigma_1+\sigma_2}

\frac{\sigma_1 \sigma_2}{\sigma_1-\sigma_2}

\frac{2 \sigma_1 \sigma_2}{\sigma_1-\sigma_2}

AP EAPCET 17th May 2023 Shift 1 Solved Paper

Section: Physics

Question : 107 of 160

Marks: +1, -0

Two metal wires of same length, same area of cross-section have conductivities of their material σ1 and σ2. If they are connected in series, the effective conductivity is

‌
σ1σ2
σ1+σ2
‌
2σ1σ2
σ1+σ2
‌
σ1σ2
σ1−σ2
‌
2σ1σ2
σ1−σ2

Validate

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