Question

Two wires of equal diameters of desistivities & Pl and P2 and lenghth x1 and x2 respectively are joined in series. The equavalent resistivity of the combination is what?​

Answer 1

Answer:

p1 x1 +p2 x2/ x1 +x2

Explanation:

Equal diameter means equal area in series

R net= R1+ R2

p net (x1+x2)/A = p1+x1/A + p2+x2/A

p net= p1 x1 +p2 x2/ x1 +x2

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