EXAMIANS
Unit of thermal conductivity in S.I. units is
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Fourier's law of heat conduction is (where Q = Amount of heat flow through the body in unit time, A = Surface area of heat flow, taken at right angles to the direction of heat flow, dT = Temperature difference on the two faces of the body, dx = Thickness of the body, through which the heat flows, taken along the direction of heat flow, and k = Thermal conductivity of the body)
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The rate of heat flow through a body is Q = [kA (T₁ - T₂)]/x. The term x/kA is known as
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Total heat is the heat required to
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Which of the following has maximum value of thermal conductivity?
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Cork is a good insulator because it has
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According to Wien's law, the wavelength corresponding to maximum energy is proportion to
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The critical temperature is the temperature
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The transfer of heat by molecular collision is smallest in
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The critical radius is the insulation radius at which the resistance to heat flow is
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