1.

Two conducting wires of samematerial, equal length and equaldiameter are connected in series.How does the heat produced by thecombination of resistance change?

Answer»

Heat produced in the circuit is inversely proportional to the resistanceR.

LetRSbe the equivalent resistances of the wires if connected in series andRPbe the equivalent resistances of the wires if connected in parallel

ThenRS=R+R=2RAnd 1/RP= 1/R +1/R

1/RP= 2/R

OrRP=R/2

Now the ratio of heat produced is given by

Hs/Hp=V^2/Rs*t/V^2/Rp*t=1/4



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