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Conduction Law

Thermal condu...

Question

Thermal conductivity is the measure of how fast a material conducts heat and it is a unique property of a material.

A

False

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B

True

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Solution

The correct option is B True

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Similar questions

A material which conducts electricity usually also conducts heat.

Why is the conductivity of heat and electricity often related?

Q. A cylinder of radius

R

made of material of thermal conductivity

K_{1}

is surrounded by a cylindrical shell of inner radius

R

and outer radius

3 R

made of a material of thermal conductivity

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. The two ends of a combined systems are maintained at two different temperatures. What is the thermal conductivity of the system?

Q. A cylinder of radius

R

made of a material of thermal conductivity

K_{1}

is surrounded by a cylindrical shell of inner radius

R

and outer radius

2 R

made of a material of thermal conductivity

K_{2}

. The two ends of the combined system are maintained at two different temperatures. There is no loss of heat across the cylindrical surface and the system is in the steady state. The effective thermal conductivity of the system is

Q. A cylinder of radius

R

made of a material of thermal conductivity

k_{1}

is surrounded by a cylindrical sheet of inner radius

R

and outer radius

2 R

made of material of thermal conductivity

k_{2}

. The two ends of the combined system are maintained at two different temperatures. There is no loss of heat across the cylindrical surface and the system is in a steady state. Calculate the effective thermal conductivity of the system. Assume that heat flow is always axial.

Q. Thermal conductivity of a material in CGS system is 0.4. In steady state, the rate of flow of heat is

10 c a l / s - c m^{2}

. The thermal gradient will be :

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