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a) 100 W(b) 75 W(c) 50 W(d) 25 Wconductingwires of the same material and of equal lengths and equal diametersTwoare first connected in series and thendifference. The ratio of heat produced in series and parallel combinations would beparallel in a circuit across the same potentialhl 2:1 |
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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=2R And 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*thenceHs/Hp=1/4 |
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