Question

The flat spring present in Aneroid barometer

• A. Depresses the rod
• B. Elevates the rod
• C. Protects the diaphragm from collapsing
• D. Decreases the atmospheric pressure

Answer 1

The correct option is C Protects the diaphragm from collapsing

Aneroid barometers are popular for their light weight and size which increases its portability. 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 which is corrugated in form of a diaphragm. Small changes in external air pressure cause the cell to expand or contract.