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JEE Main 2021 (Online) 25th July Evening Shift
Numerical
+4
-1
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A system consists of two types of gas molecules A and B having same number density 2 $$\times$$ 1025/m3. 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
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2
JEE Main 2021 (Online) 22th July Evening Shift
Numerical
+4
-1
Change Language
The area of cross-section of a railway track is 0.01 m2. The temperature variation is 10$$^\circ$$C. Coefficient of liner expansion of material of track is 10$$-$$5/$$^\circ$$C. The energy stored per meter in the track is ____________ J/m.

(Young's modulus of material of track is 1011 Nm$$-$$2)
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3
JEE Main 2021 (Online) 20th July Evening Shift
Numerical
+4
-1
Change Language
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)

JEE Main 2021 (Online) 20th July Evening Shift Physics - Heat and Thermodynamics Question 165 English
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4
JEE Main 2021 (Online) 20th July Morning Shift
Numerical
+4
-1
Change Language
In the reported figure, heat energy absorbed by a system in going through a cyclic process is ___________ $$\pi$$J.

JEE Main 2021 (Online) 20th July Morning Shift Physics - Heat and Thermodynamics Question 169 English
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