1
JEE Main 2021 (Online) 20th July Morning Shift
Numerical
+4
-1
In the reported figure, heat energy absorbed by a system in going through a cyclic process is ___________ $$\pi$$J.

2
JEE Main 2021 (Online) 16th March Evening Shift
Numerical
+4
-1
Out of Syllabus
For an ideal heat engine, the temperature of the source is 127$$^\circ$$C. In order to have 60% efficiency the temperature of the sink should be ___________$$^\circ$$C. (Round off to the Nearest Integer)
3
JEE Main 2021 (Online) 26th February Evening Shift
Numerical
+4
-1
1 mole of rigid diatomic gas performs a work of $${Q \over 5}$$ when heat Q is supplied to it. The molar heat capacity of the gas during this transformation is $${xR \over 8}$$. The value of x is _________. [R = universal gas constant]
4
JEE Main 2021 (Online) 26th February Evening Shift
Numerical
+4
-1
The volume V of a given mass of monoatomic gas changes with temperature T according to the relation $$V = K{T^{{2 \over 3}}}$$. The workdone when temperature changes by 90K will be xR. The value of x is _________. [R = universal gas constant]