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JEE Main 2021 (Online) 20th July Evening Shift
Numerical
+4
-1
One mole of an ideal gas at 27$$^\circ$$ is taken from A to B as shown in the given PV indicator diagram. The work done by the system will be _________ $$\times$$ 10$$-$$1 J. [Given : R = 8.3 J/mole K, ln2 = 0.6931] (Round off to the nearest integer)

2
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.

3
JEE Main 2021 (Online) 18th March Morning Shift
Numerical
+4
-1
Two separate wires A and B are stretched by 2 mm and 4 mm respectively, when they are subjected to a force of 2 N. Assume that both the wires are made up of same material and the radius of wire B is 4 times that of the radius of wire A. The length of the wires A and B are in the ratio of a : b. Then a/b can be expressed as 1/x where x is _________.
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)