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Two conducting rods when connected between two points at constant but different temperatures separately, the rate of heat flow through them is `q_1 and q_2`.A. When they are connected in series, the net rate of heat flow is `q_1 + q_2`B. When they are connected in series, the net rate of heat flow is `((q_1q_2)/(q_1+q_2))`C. When they are connected in parallel, the net rate of heat flow is `q_1 + q_2`D. When they are connected in parallel, the net rate of heat flow is `((q_1q_2)/(q_1+q_2))` |
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Answer» Correct Answer - B::C `q_1 = (TD)/R_1` `R_1 = (TD)/q_1` Similarly, `R_2 = (TD)/q_2` In series, `q_s = (TD)/(R_1+R_2)= (TD)/(((TD)/q_1) + ((TD)/q_2))` `=(q_1q_2)/(q_1+q_2)` In parallel, `q_p = (TD)/R_(net) = (TD) (1/R_(net))` `=TD (1/R_1 + 1/R_2)` `=TD ( q_1/(TD) + q_2/(TD)) = q_1 + q_2` . |
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