Question

In altimeters

• A. Fall in the length of the mercury can be converted in terms of altitude
• B. Fall in the height of the mercury can not be converted in terms of altitude
• C. Fall in the length of the mercury can be directly converted in terms of density of air
• D. All of these

Answer 1

The correct option is A Fall in the length of the mercury can be converted in terms of altitude

As the barometric pressure falls by one centimetre, of we go up by 105 m approx. This fact is used in altimeters where the fall in the length of the mercury column can be directly converted in terms of height.