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AnswersThree rods of same dimensions are arranged as shown in the figure. They have thermal conductivities [K_1] , [K_2] and [K_3] . The points [A] and [B] are mainted at different temperatures. For the heat to flow at the same rate along [ACB] and [AB] , 1) [K_3] = [(K_1K_2)/(K_1+K_2)] 2) [K_3] = 2( [K_1 + K_2)] 3) [K_3 = 1/2 (K_1 + K_2)] 4) [K_3= K_1+K_2]
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