Question

The value of g at a place decreases by 2%. The barometric height of mercury

• A. Increases by 2%
• B. Decreases by 2%
• C. Remains unchanged
• D. Sometimes increases and sometimes decreases

Answer 1

The correct option is A

Increases by 2%

$h=\frac{P}{\rho g}\therefore h\propto \frac{1}{g}$ (P and $\rho$ are constant)

If value of g decreased by 2% then h will increase by 2%.