Two metallic wires of identical dimensions are connected in series. If \sigma_1 and \sigma_2 are the conductivities of the these wires respectively, the effective conductivity of the combination is : [29-Jul-2022-Shift-1]

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}{2 \sigma_1 \sigma_2}

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

JEE Mains 29-July-2022 Shift 1 Solved Paper

Section: Physics

Question : 42 of 90

Marks: +1, -0

Two metallic wires of identical dimensions are connected in series. If σ1 and σ2 are the conductivities of the these wires respectively, the effective conductivity of the combination is :

[29-Jul-2022-Shift-1]

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

Validate

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