Home Physics Thermometry, Thermal Expansion and Calorimetry General Consider a cylindrical container of cross se…
Physics Thermometry, Thermal Expansion and Calorimetry General MCQ (Single Correct)

Consider a cylindrical container of cross section area ‘A’, length ‘h’ having coefficient of linear expansion α C . The container is filled by liquid of volume expansion coefficient γ L up to height h 1 . When temperature of the system is increased by Δθ then

A
Find out new height, area and volume of cylindrical container and new volume of liquid.
B
Find the height of liquid level when expansion of container is neglected.
C
Find the relation between γ L and α c for which volume of container above the liquid level. (i) increases (ii) decreases (iii) remains constant.
D
If γ L > 3α c and h = h 1 then calculate, the volume of liquid overflow. (e) If the surface of a cylindrical container is marked with numbers for the measurement of liquid level of liquid filled inside it. Assuming correct marking at initial temperature if we increase the temperature of the system by Δθ then (i) Find height of liquid level as shown by the scale on the vessel. Neglect expansion of liquid (ii) Find height of liquid level as shown by the scale on the vessel. Neglect expansion of
container. (iii) Find relation between γ L and α C so that height of liquid level with respect to ground (1) increases (2) decreases (3) remains constant.

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Text Solution

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The correct answer is:
CHECK THE SOLUTION.

h f = h {1+ α c Δθ }

A f = A {1 + 2 α c Δθ }

v f = Ah {1 + 3 α c Δθ }

volume of liquid V W = Ah 1 (1+ γ L Δθ )

h f = h 1 {1 + γ L Δθ }

(i) 3h α c > h 1 γ λ

(ii) 3h α c < h 1 γ λ

(iii) 3h α c = h 1 γ λ

Δ V = Ah ( γ L – 3 α C ) Δθ

(e) (i) h f = h 1 (1 – 3 α C Δθ )

(ii) h f = h 1 (1 + γ L Δθ )

(iii) (1) γ L > 2 α c

(2) γ L < 2 α c

(3) γ L = 2 α c

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