CBSE Class 10 Answered
2 exactly similar heating resistances are to be used to connect across a main supply to heat some water. Is more heat obtained per minute if they are connected in series or in parallel? Give reasons for your answer.
Asked by | 17 Jul, 2011, 04:40: PM
Expert Answer
Resultant resistance in a series combination is greater than any individual resistance, and resultant resistance in a parallel combination is smaller than any individual resistance.
since H
R; so more the resistance, more the heat. Therefore, the resistances must be connected in series to obtain more heat per minute.
R; so more the resistance, more the heat. Therefore, the resistances must be connected in series to obtain more heat per minute.
Answered by | 18 Jul, 2011, 12:52: AM
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