Heat Transfer Questions

Q.  Thermal conductivity of a material may be defined as the________________?

a. quantity of heat flowing in one second through one cm cube of material when opposite faces ^re maintained at a temperature difference of 1°C
b. quantity of heat flowing in one second through a slab of the material of area one cm square, thickness 1 cm when its faces differ in temperature by 1Â
c. heat conducted in unit time across unit area through unit thickness when a temperature difference of unity is maintained between opposite faces
d. all of the above
e. none of the above


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