1

JEE Main 2021 (Online) 31st August Evening Shift

Numerical

+4

-1

A sample of gas with $$\gamma$$ = 1.5 is taken through an adiabatic process in which the volume is compressed from 1200 cm

^{3}to 300 cm^{3}. If the initial pressure is 200 kPa. The absolute value of the workdone by the gas in the process = _____________ J.Your input ____

2

JEE Main 2021 (Online) 27th August Evening Shift

Numerical

+4

-1

Out of Syllabus

A heat engine operates between a cold reservoir at temperature T

_{2}= 400 K and a hot reservoir at temperature T_{1}. It takes 300 J of heat from the hot reservoir and delivers 240 J of heat to the cold reservoir in a cycle. The minimum temperature of the hot reservoir has to be ______________ K.Your input ____

3

JEE Main 2021 (Online) 27th August Morning Shift

Numerical

+4

-1

A rod CD of thermal resistance 10.0 KW

^{$$-$$1}is joined at the middle of an identical rod AB as shown in figure. The end A, B and D are maintained at 200$$^\circ$$C, 100$$^\circ$$C and 125$$^\circ$$C respectively. The heat current in CD is P watt. The value of P is ................. .Your input ____

4

JEE Main 2021 (Online) 25th July Evening Shift

Numerical

+4

-1

A system consists of two types of gas molecules A and B having same number density 2 $$\times$$ 10

^{25}/m^{3}. The diameter of A and B are 10 $$\mathop A\limits^o $$ and 5 $$\mathop A\limits^o $$ respectively. They suffer collision at room temperature. The ratio of average distance covered by the molecule A to that of B between two successive collision is ____________ $$\times$$ 10^{$$-$$2}Your input ____

Questions Asked from Heat and Thermodynamics (Numerical)

Number in Brackets after Paper Indicates No. of Questions

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