Barometer is used to measure A. pressure in pipes, channels etc B. atmospheric pressure C. very low pressure D. difference of pressure between two points

The correct answer is: B. atmospheric pressure.

A barometer is an instrument used to measure atmospheric pressure. It is a simple device that consists of a glass tube filled with mercury and inverted into a dish of mercury. The mercury in the tube will rise or fall depending on the atmospheric pressure.

Option A is incorrect because a barometer is not used to measure pressure in pipes, channels, etc. A manometer is used

288 448 288 448s170.8 0 213.4-11.5c23.5-6.3 42-24.2 48.3-47.8 11.4-42.9 11.4-132.3 11.4-132.3s0-89.4-11.4-132.3zm-317.5 213.5V175.2l142.7 81.2-142.7 81.2z"/> Subscribe on YouTube