# NEET Physics Thermodynamics Questions Solved

A closed hollow insulated cylinder is filled with gas at 0°C and also contains an insulated piston of negligible weight and negligible thickness at the middle point. The gas on one side of the piston is heated to 100°C. If the piston moves 5 cm, the length of the hollow cylinder is -

(1) 13.65 cm

(2) 27.3 cm

(3) 38.6 cm

(4) 64.6 cm

Concept Videos :-

#3 | Thermodynamic Processes
#4 | Isobaric Process
#5 | Isochoric & Isothermal Process
#6 | Interconversion of Graphs
#7 | Solved Example: 1
#8 | Solved Example: 2
#10 | Solved Example: 3
#11 | Graphs in Adiabatic Process: 1
#12 | Graphs in Adiabatic Process: 2

Concept Questions :-

Types of processes

(4) Using Boyle’s law, we have $\frac{V}{T}=$ constant

$\frac{A\left(\frac{l}{2}+5\right)}{373}=\frac{A\left(\frac{l}{2}-5\right)}{273}$

As the piston moves 5 cm, the length of one side will be $\left(\frac{l}{2}+5\right)$and other side $\left(\frac{l}{2}-5\right)$. On solving this equation, we get l = 64.6 cm.

Difficulty Level:

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