Question

The system of lever in Aneroid barometer helps in

• A. Protecting the diaphragm from collapsing
• B. Reducing atmospheric pressure
• C. Increasing atmospheric pressure
• D. Magnifying the tiny movement of central lever

Answer 1

The correct option is D

Magnifying the tiny movement of central lever

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. 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.