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  1. >>Class 11
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  3. >>Thermal Properties of Matter
  4. >>BITSAT Questions

Thermal Properties Of Matter

Physics
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JEE MainsJEE AdvancedNEETBITSATEasy QsMed QsHard Qs
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A hot and a cold body are kept in vacuum separated from each other. Which of the following causes decrease in temperature of the hot body?

A
Radiation
B
Convection
C
Conduction
D
Temperature remains unchanged
Easy
BITSAT
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0.5 moles of an ideal gas at constant temperature 27∘C kept inside a cylinder of length L and cross-section area A closed by a massless piston.
The cylinder is attached with a conducting rod of length L, cross-section area (91​)m2 and thermal conductivity k, whose other end is maintained at 0∘C. If piston is moved such that rate of heat flow through the conducing rod is constant then velocity of piston when it is at height 2L​ from the bottom of cylinder is:
[Neglect any kind of heat loss from system]

A
(Rk​)m/sec
B
(10Rk​)m/sec
C
(100Rk​)m/sec
D
(1000Rk​)m/sec
Hard
BITSAT
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