Physics-
General
Easy
Question
The figure shows a glass tube (linear co-efficient of expansion is a) completely filled with a liquid of volume expansion co-efficient g. On heating length of the liquid column does not change. Choose the correct relation between g and a
The correct answer is:
When length of the liquid column remains constant, then the level of liquid moves down with respect to the container, thus g must be less than 3a.
Now we can write V = V0(1 + g DT)
Since V = Al0 = [A0 (1 + 2aDT)]l0 = V0 (1 + 2aDT)
Hence V0(1 + g DT) = V0(1 + 2aDT) Þ g = 2a
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