EASY
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Two metallic rods of equal length and cross-section but thermal conductivities and are welded together end to end. The resulting thermal conductivity of this resulting rod will be
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Important Questions on Thermal Properties of Matter
HARD
JEE Main/Advance
IMPORTANT
A metal sphere having inner radius a and outer radius has thermal conductivity . The thermal resistance between inner and outer surface for radial heat flow is
EASY
JEE Main/Advance
IMPORTANT
The figure shows the face and interface temperature of a composite slab consisting of four materials, of identical thickness, through which the heat transfer is steady. Which material has maximum thermal conductivity?
MEDIUM
JEE Main/Advance
IMPORTANT
In a room where the temperature is a body cools from to in . The time (in min) taken by the body to cool from to will be
MEDIUM
JEE Main/Advance
IMPORTANT
A block of ice at is slowly heated and converted to steam at . Which of the following curves represent the phenomenon qualitatively?
EASY
JEE Main/Advance
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The wavelength corresponding to maximum spectral radiancy of a black body is . Consider another black body whose surface area is twice that of and total radiant energy emitted by is times that emitted by . The wavelength corresponding to maximum spectral radiancy for will be
EASY
JEE Main/Advance
IMPORTANT
The coefficient of volume expansion for an ideal gas at constant pressure
MEDIUM
JEE Main/Advance
IMPORTANT
A spherical black body with a radius of radiates power at . If the radius were halved with the temperature doubled, the power radiated in watt would be
EASY
JEE Main/Advance
IMPORTANT
A thin walled cylindrical metal vessel contains a liquid If the vessel and its contents are now heated by the pressure due to the liquid at the bottom
