Question

The instrument used for measuring air pressure is called:

• A. Anemometer
• B. Barometer.
• C. Hygrometer
• D. Thermometer

Answer 1

The correct option is B

Barometer.

Explanation for correct option:
Option B:

1. Barometer: A barometer is an instrument that is used to measure the air pressure.
2. It was invented in the year 1643 by an Italian scientist named Evangelista Torricelli.
3. He closely studied the characteristics of mercury when placed in a vacuum and used that theory to develop the first barometer.
   

Explanation for incorrect options:
Option A:
Anemometer is a device that is used to calculate the speed of wind.

Option C:

A hygrometer is a specially designed device that is used to calculate the relative humidity in an open or enclosed area.

Option D:
A thermometer is a device that is used for measuring the temperature.
Thus, the correct answer is option B.