Heat current depends on thermal conductivity, area, temperature difference and dimension of object

False

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True

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Solution

The correct option is B True

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Similar questions

Q. Thermal conductivity (

k

) depends on the material, and not the dimensions and mass of the body.

Q. The dimension of coefficient of thermal conductivity is

(\frac{d Q}{d t} = - K A \frac{d T}{d x})

, where

d Q

is heat transferred,

d t

is time taken,

K

is coefficient of thermal conductivity,

A

is cross-sectional area of conductor,

d T

is change in temperature and

d x

is length of conductor.

Q. One-dimensional steady state heat conduction takes place through a solid whose cross-sectional area varies linearly in the direction of heat transfer. Assume there is no heat generation in the solid and thermal conductivity of the material is constant and independent of temperature. The temperature distribution in the solid is

Q. Two ends of a conducting rod of varying cross-section are maintained at

200^{\circ} C

and

0^{\circ} C

respectively. In staedy state

A uniform slab of dimension $10 c m \times 10 c m \times 1 c m$ is kept between two heat reservoirs at temperatures $10^{0} C$ and $90^{0} C$ . The larger surface areas touch the reservoirs . The thermal conductivity of the material is $0.80 W / m -^{0} C$ . Find the amount of heat flowing through the slab per second.

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