Question

two wires of metal have same length bt their cross sectional areas are in the ratio 3:1 joined in series.The resistance of thicker wire is 10 ohm.then what will be total resistance combination?

Answer 1

R=1/A
As, the resistance of the thinner wire is 10 ohm, the resistance ce of the thicker wire will be 10/3=3.33ohm
now they are connected in series so their resistance combination,
R= R1 + R2 = 10 + 3.33= 13.33 ohm(ans)