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:

(B) (2 σ₁ σ₂)/(σ₁+σ₂)

(A) (σ₁ σ₂)/(σ₁+σ₂)

(C) (σ₁+σ₂)/(2 σ₁ σ₂)

(D) (σ₁+σ₂)/(σ₁ σ₂)

Current Electricity: JEE Main 2022 Physics question

JEE Main 2022 · 29 Jul, Morning shift · Q6519

JEE Main 202229 Jul, Morning shiftPhysicsEasyCurrent Electricity150× since 2002

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 :

JEE Main 2022 · 29 Jul, Morning shift · Q6519

JEE Main 202229 Jul, Morning shiftPhysicsEasyCurrent Electricity150× since 2002

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 :