1

WB JEE 2020

MCQ (Single Correct Answer)

+2

-0.5

A metallic block of mass 20 kg is dragged with a uniform velocity of 0.5 ms

^{-1}on a horizontal table for 2.1 s. The coefficient of static friction between the block and the table is 0.10. What will be the maximum possible rise in temperature of the metal block, if the specific heat of the block is 0.1 CGS unit? Assume g = 10 ms^{-2}and uniform rise in temperature throughout the whole block. [Ignore absorption of heat by the table]2

WB JEE 2019

MCQ (Single Correct Answer)

+1

-0.25

Two black bodies A and B have equal surface areas are maintained at temperatures 27$$^\circ$$C and 177$$^\circ$$C respectively. What will be the ratio of the thermal energy radiated per second by A to that by B?

3

WB JEE 2019

MCQ (Single Correct Answer)

+1

-0.25

What will be the molar specific heat at constant volume of an ideal gas consisting of rigid diatomic molecules?

4

WB JEE 2019

MCQ (Single Correct Answer)

+1

-0.25

Consider the given diagram. An ideal gas is contained in a chamber (left) of volume V and is at an absolute temperature T. It is allowed to rush freely into the right chamber of volume V which is initially vacuum. The whole system is thermally isolated. What will be the final temperature of the equilibrium has been attained?

Questions Asked from Heat and Thermodynamics (MCQ (Single Correct Answer))

Number in Brackets after Paper Indicates No. of Questions

WB JEE Subjects

Physics

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Units & Measurements Vector Algebra Motion Laws of Motion Circular Motion Work Power & Energy Center of Mass Rotational Motion Properties of Matter Heat and Thermodynamics Simple Harmonic Motion Waves Gravitation

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Modern Physics

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Physical Chemistry

Some Basic Concepts of Chemistry Atomic Structure Redox Reaction Gaseous State Chemical Equilibrium Liquid Solution Ionic Equilibrium Thermodynamics Chemical Kinetics Radioactivity and Nuclear Chemistry Electrochemistry Solid State Surface Chemistry

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