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{"ops":[{"insert":"This question refers to a perfectly lagged bar comprised of materials X, Y and Z of\nconductivities k x , k y , and k z respectively. The graph shown indicates the variation of temperature\n\u03b8 with distance D from the hotter end of the bar when a temperature difference is set up across\nthe length. Steady state conditions prevail and each material is of length 20 cm.\n\nLagged bar\n\n110 0 C X Y Z 25 0 C\n\n\u03b8 \/ 0 C D\/cm\n110\n\n25\n0\n\n20 40 60 D\/cm\nX Y Z\nWhich of the following is true of the conductivities of X, Y and Z?\nA) k x > k y > k z\nB) k x > k z > k y\nC) k y > k z > k x\nD) k z > k x > k y\n"}]}
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