Question

00Hg
ITU
A barometer having a metallic scale reads a height H, at temperature 0°C. The true
scale is calibrated at 0°C. If a is the coefficient of linear expansion of the metal and y the
coefficient of cubical expansion of mercury, the correct pressure H. correct is

Answer 1

Solution :

(a) True value=Scale reading

<br> Here, Scale reading

<br>

<br> True value

<br> (b) True value=Scale reading

<br>

<br>

<br> Let length of mercury column at

is

<br>

<br>

<br>

<br>