Question

Briefly describe the working of barometer



btado​

Answer 1

Answer:

Barometer measures pressure at a certain height.

It contains mercury which when immersed in a glass tube, the atmospheric pressure presses the mercury.

This causes the mercury to rise up or come down which leads to increase and decrease in pressure respectively.

Answer 2

The term "barometer" refers to a device that measures atmospheric pressure. Because air pressure changes with distance from sea level, it can also be used to estimate altitude or height.

Explanation:

• A barometer is made up of a glass tube with one open end and the other closed. Mercury is present in the tube. The open end is then reversed and inserted into an open mercury reservoir.
• The tube will not be fully empty due to the presence of vacuum in the tube, and some mercury will remain. As a result, the pressure inside the tube is equal to the air pressure outside.
• When the pressure outside the tube is reduced, the pressure on the mercury in the reservoir is reduced as well. This is due to the fact that more mercury will be ejected from the tube.
• When the pressure outside the tube rises, the pressure inside the tube rises as well, forcing a little amount of mercury into the tube. The mercury level in the tube rises as a result of this.