NEET UG PHYSICS MCQ: THERMAL PROPERTIES OF MATTER

1 Easy

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Application +4 | -1

Two metallic wires of identical dimensions are connected in series. If

\sigma_1

and

\sigma_2

are the conductivities of these wires respectively, the effective conductivity of the combination is :

View answer and explanation

Correct option: B

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

Option B (

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

) is correct because the effective conductivity is derived from the series combination of resistances.

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