Write down the thermal conductivity of substances listed below: 1.Concrete, 2.Water, 3.Glass wool, 4.Air, 5.Helium, 6.Hydrogen, 7.Oxygen.
The unit of thermal conductivity is
The thermal conductivity of a rod depends on
Two rods of equal length and diameter have thermal conductivities 3 & 4 units .it they joined in series . Find the thermal conductivity of the combination.
Define thermal conductivity. Give its unit.
If the ratio of coefficient of thermal conductivity of silver and copper is 10:9, then the ratio of the lengths upto which wax will melt in Ingen Hausz experiment will be
Two rods Aand B of different material are welded together as shown in figure . Their thermal conductivity of the composite rod will be:
Two identical rods of copper and iron are coated with wax uniformly. When one end of each is kept at temperature of boiling water, the length upto which wax melts are 8.4cm and 4.2cm respectively. If thermal conductivity of copper is 0.92, then thermal conductivity of iron is
Assertion (A): Metals have high thermal conductivity. Reason (R): Absence of band gap is the main reason for high thermal conductivity.
If two metallic plates of equal thickness and thermal conductivities K_1 and K_2 are put together face to face and a common plate is constructed, then the equivalent thermal conductivity of this plate will be
CHETAN PUBLICATION-HEAT-ASSIGNMENT - 5 (Answer the following: (Any 1))
