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Questions and Answers
What is the unit of thermal conductivity in S.I. system?
What is the unit of thermal conductivity in S.I. system?
- J/m-sec-K
- Cal/m-sec-oC
- W/m-K (correct)
- kcal/m-sec-K
What is the dimension of thermal conductivity?
What is the dimension of thermal conductivity?
- [M1L32]
- [MLT31] (correct)
- [L2]
- [L1]
What determines the magnitude of thermal conductivity of a material?
What determines the magnitude of thermal conductivity of a material?
- Temperature of the material
- Length of the material
- Cross-sectional area of the material
- Nature of the material (correct)
What is the characteristic of good conductors of heat?
What is the characteristic of good conductors of heat?
What is the temperature difference between the opposite faces of a rod when Q = K, given A = 1m2, t = 1 sec, and l = 1m?
What is the temperature difference between the opposite faces of a rod when Q = K, given A = 1m2, t = 1 sec, and l = 1m?
What is the effective thermal conductivity of a system with a cylinder of radius R made of a material of thermal conductivity K1 surrounded by a cylindrical shell of inner radius R and outer radius 2R made of material of thermal conductivity K2?
What is the effective thermal conductivity of a system with a cylinder of radius R made of a material of thermal conductivity K1 surrounded by a cylindrical shell of inner radius R and outer radius 2R made of material of thermal conductivity K2?
What is the temperature of the interface of a compound wall in terms of their thermal resistances R1 and R2?
What is the temperature of the interface of a compound wall in terms of their thermal resistances R1 and R2?
What is the equivalent thermal conductivity of a system with two materials in parallel combination?
What is the equivalent thermal conductivity of a system with two materials in parallel combination?
What is the heat current in a system with a temperature gradient?
What is the heat current in a system with a temperature gradient?
What is the relationship between the thermal conductivity and thermal resistance of a material?
What is the relationship between the thermal conductivity and thermal resistance of a material?
In series combination of conductors, what is the relation between the heat current in each conductor?
In series combination of conductors, what is the relation between the heat current in each conductor?
What is the equivalent thermal conductivity for n slabs of equal length in series combination?
What is the equivalent thermal conductivity for n slabs of equal length in series combination?
In a series combination of conductors, what is the relation between the temperature gradient and the thermal conductivity?
In a series combination of conductors, what is the relation between the temperature gradient and the thermal conductivity?
If two slabs of equal length are connected in series, what is the equivalent thermal conductivity?
If two slabs of equal length are connected in series, what is the equivalent thermal conductivity?
What is the correct expression for the equivalent thermal conductivity for two slabs of equal length in parallel combination?
What is the correct expression for the equivalent thermal conductivity for two slabs of equal length in parallel combination?
In a series combination of slabs, what is the correct expression for the equivalent thermal conductivity?
In a series combination of slabs, what is the correct expression for the equivalent thermal conductivity?
What is the relation between the heat current and the temperature gradient in a slab?
What is the relation between the heat current and the temperature gradient in a slab?
In a parallel combination of slabs, what is the correct expression for the equivalent thermal conductivity?
In a parallel combination of slabs, what is the correct expression for the equivalent thermal conductivity?
What is the correct expression for the temperature gradient in a slab?
What is the correct expression for the temperature gradient in a slab?
What is the relation between the equivalent thermal conductivity and the thermal resistances of two slabs in parallel combination?
What is the relation between the equivalent thermal conductivity and the thermal resistances of two slabs in parallel combination?
If three slabs of equal lengths are connected in series, what is the equivalent thermal conductivity in terms of their thermal conductivities K1, K2, and K3?
If three slabs of equal lengths are connected in series, what is the equivalent thermal conductivity in terms of their thermal conductivities K1, K2, and K3?
In a parallel combination of two slabs of equal area, what is the equivalent thermal conductivity in terms of their thermal conductivities K1 and K2?
In a parallel combination of two slabs of equal area, what is the equivalent thermal conductivity in terms of their thermal conductivities K1 and K2?
What is the heat current in a system with a temperature gradient Δθ and thermal conductivity K, cross-sectional area A, and length l?
What is the heat current in a system with a temperature gradient Δθ and thermal conductivity K, cross-sectional area A, and length l?
What is the temperature gradient in a system with a heat current Q, thermal conductivity K, cross-sectional area A, and length l?
What is the temperature gradient in a system with a heat current Q, thermal conductivity K, cross-sectional area A, and length l?
If two slabs of equal lengths are connected in series, what is the equivalent thermal conductivity in terms of their thermal conductivities K1 and K2?
If two slabs of equal lengths are connected in series, what is the equivalent thermal conductivity in terms of their thermal conductivities K1 and K2?
In a series combination of two slabs of equal length, what is the equivalent thermal conductivity if the thermal conductivities of the slab are K1 and K2?
In a series combination of two slabs of equal length, what is the equivalent thermal conductivity if the thermal conductivities of the slab are K1 and K2?
In a parallel combination of two slabs of equal length, what is the equivalent thermal conductivity if the thermal conductivities of the slab are K1 and K2?
In a parallel combination of two slabs of equal length, what is the equivalent thermal conductivity if the thermal conductivities of the slab are K1 and K2?
In a rod, the heat current is given by Q = KA(θ1 - θ2) / l. What is the correct unit of thermal conductivity in S.I. system?
In a rod, the heat current is given by Q = KA(θ1 - θ2) / l. What is the correct unit of thermal conductivity in S.I. system?
In a system with a temperature gradient, what is the relationship between the heat current (Q) and the temperature difference (θ1 - θ2)?
In a system with a temperature gradient, what is the relationship between the heat current (Q) and the temperature difference (θ1 - θ2)?
For two slabs of equal length in parallel combination, what is the correct expression for the equivalent thermal conductivity?
For two slabs of equal length in parallel combination, what is the correct expression for the equivalent thermal conductivity?
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