Question

An ideal gas is trapped between Hg thread of 12cm and the closed lower end of a narrow vertical tube of uniform cross section. Length of the air column is 20.5cm. When the open end is kept upward. If the tube is making $30^{\circ}$ with the horizontal then the length of the air column is (assuming temperature to be constant and atmospheric pressure = 76cm of Hg)

• A. 22cm
• B. 18cm
• C. 24cm
• D. 20.2cm

Answer 1

Answer: (A)

22cm

Answer 2

Answer (a) 22cm