Question

Which of the following barometer will show the accurate reading?

• A. Only A
• B. Only B
• C. Only C
• D. All of the above

Answer 1

The correct option is D

All of the above

The barometric height remains same even when the shape of the tube is changed or the length of tube submerged inside mercury in the trough is changed or tube is tilted from its vertical position. Thus, all three barometers A, B and C will show a same and accurate reading.