Two conducting wires of same material and of equal lengths and equal diameters are first connected in series and then in parallel in a circuit across the same potential difference. What is the ratio of heat produced in series and parallel combination for the same time duration?
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ANS = 4:1
formula of heat produced is IR*2
in series connection equivalent resistance is 2R and in parallel it is R/2
put in formula for same current I U will get the ANS
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