Two bulbs of $$500$$ watt and $$200$$ watt are manufactured to operate on $$220$$ volt line. The ratio of heat produced in $$500$$ W and $$200$$ W, in two cases, when firstly they are joined in parallel and secondly in series, will be

Question

Infinity Learn · Accepted Answer

Resistance $$R1$$ of $$500$$ W bulb $$=$$  $$2202500Resistance$$ $$R2$$ of $$200$$ W bulb $$=$$  $$2202200When$$ joined in parallel, the potential difference across both the bulbs will be same.Ratio of heat produced $$=$$   $$V2/R1V2/R2$$ $$=$$ $$R2R1=$$ $$52when$$ joined in series, the same current will flow through both the bulbs.Ratio of heat produced $$=$$   $$i2R1i2R2$$ $$=$$ $$R1R2=$$ $$25$$

Two bulbs of 500 watt and 200 watt are manufactured to operate on 220 volt line. The ratio of heat produced in 500 W and 200 W, in two cases, when firstly they are joined in parallel and secondly in series, will be

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