Question

Early barometers used mercury to measure the pressure of the atmosphere. Nowadays, mercury is considered a health and safety risk, and so a different type of barometer is used.
What is the name given to this type of barometer?

• A. Aneroid barometer
• B. Simple barometer
• C. Alcohol barometer
• D. Vacuum barometer

Answer 1

The correct option is A Aneroid barometer

$Answer:-$ A

New type of barometer used nowadays is :-

An aneroid barometer is an instrument for measuring pressure as a method that does not involve liquid. Invented in 1844 by French scientist Lucien vidi the aneroid barometer uses a small, flexible metal box called an aneroid cell (capsule), which is made from an alloy of beryllium and copper. 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.