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Question-1. What is thermal conductivity?
Answer-1: It is defined as the quantity of heat conducted per second normally across unit area of cross section of the material per unit temperature difference. It denotes the heat heat conducting power. Its unit is Watt meter-1 kelvin-1
Question-2. Does the value of thermal conductivity depend on the dimension of the specimen?
Answer-2: No, it depends only on the material of the specimen.
Question-3. Can this method be used for good conductors?
Answer-3: No, in that case, due to large conduction of heat, the temperature recorded by T1 and T2 will be very nearly the same.
Question-4. Is there any reason totake the specimen in the form of a disc?
Answer-4: A thin disc is taken because its area of cross section is large, while thickness is small. It increases the quantity of heat conducted across its faces.
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