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Thermal Physics

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12 Jan 2008 15:54:51 IST

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Please provide with complete solution

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Please provide with complete solution

1. A long cylindrical vessel of volume V &linear coefficient of expansion

contains a liquid. The level of liquid does not change on heating. The volume coefficient real expansion of liquid is:

2.Two rods of length l₁&l₂ are made of materials whose coefficients linear

expansions are

₁&

₂respectively. If the difference between the two lengths is independent of temp, then:

3.In a thermo couple, one junction which is at 0^oC & the other at t^oC , the emf is given by E= at²-bt³, the neutral temp is (in ^oC):

4.The relationship between saturated vapour pressur p & absolute temperature t is:

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Bipin Dubey

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Joined: 23 Jan 2007

Posts: 7942

12 Jan 2008 16:35:13 IST

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2. Suppose the temperature of both the rods are increased by t.

New length of 1st rod = l₁(1+

₁t)

New length of 2nd rod = l₂(1+

₂t)

Since difference in lentgh is independent of temperature :

l₂(1+

₂t) - l₁(1+

₁t) = l₂ - l₁

l₂

₂t - l₁

₁t = 0

l₂

₂ = l₁

₁

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