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Physics · 2026 · 1 mark
CBSE 2026 · Region 4 · Set 1 · Q1
Two wires of same length and same area of cross-section but made of different material of resistivities ρ_1 and ρ_2 are connected in series. The…
Two wires of same length and same area of cross-section but made of different material of resistivities $\displaystyle \rho_{1}$ and $\displaystyle \rho_{2}$ are connected in series. The equivalent resistivity of the combination is :
Official answer
(A)
$\displaystyle \frac{1}{2}\left(\rho_{1}+\rho_{2}\right)$
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