The graph of elongation of rod of a substance A with temperature rise is shown if Fig. A liquid B contained in a cylindrical cessel made up of substance A, graduated in millilitres at `0^@C` is heated gradually. The readings of the liquid level in the vessel corresponding to different temperatures are shown in the figure. the real volume expansivity of liquid isA. `2.7xx10^(-5)//^@C`B. `15.4xx10^(-5)//^@C`C. `16.2xx10^(-5)//^@C`D. `151.2xx10^(-5)//^@C`

The graph of elongation of rod of a substance A with temperature rise

1.	The graph of elongation of rod of a substance A with temperature rise is shown if Fig. A liquid B contained in a cylindrical cessel made up of substance A, graduated in millilitres at `0^@C` is heated gradually. The readings of the liquid level in the vessel corresponding to different temperatures are shown in the figure. the real volume expansivity of liquid isA. `2.7xx10^(-5)//^@C`B. `15.4xx10^(-5)//^@C`C. `16.2xx10^(-5)//^@C`D. `151.2xx10^(-5)//^@C`
Answer» Correct Answer - C From Fig. (a) the slope of line is `(DeltaL)/(DeltaT)=((1002.2-1000.0)mm)/((300-0)^@C)` `=4xx10^-6(m)//^@C` But `(DeltaL)/(DeltaT)=Lalpha` `alpha=(4xx10^-6)/(1m)(m//^@C)` `4xx10^(-6)//^@C`

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