Question

If the temperature rise is measured in Fahrenheit scale instead of the centigrade scale, the numerical value of coefficient of linear expansion of liquid is

• A. remains same
• B. decreased
• C. increased
• D. depends upon the nature of the liquid

Answer 1

The correct option is B decreased

We know,
$\because F=\frac{9}{5}C+32$

Hence $\Delta T_F>\Delta T_C$

'$\Delta L=L\alpha \Delta T$
$\therefore \alpha \propto \frac{1}{\Delta T}$
When scale is converted from centigrade to Fahrenheit,
$\Delta T$ increases
Thus,
$\alpha$ decreases