Question

Barometer which does not use any liquid is known as _________ barometer

• A. fortin's
• B. aneroid
• C. simple
• D. none

Answer 1

The correct option is B aneroid

The Aneroid barometer uses a small, flexible metal box called an aneroid cell (capsule). The evacuated capsule (or usually several capsules, stacked to add up their movements) is prevented from collapsing by a strong spring. Small changes in external air pressure cause the cell to expand or contract. This expansion and contraction drives mechanical levers such that the tiny movements of the capsule are amplified and displayed on the face of the aneroid barometer.