Question

Two vessels A and B of cross-section as shown in figure contain a liquid upto the same height. As the temperature rises, the liquid pressure at the bottom (neglecting expansion of the vessels) will:

• A.
• B. increase in A, decrease in B
• C. decrease in both A and B
• D. increase in both A and B

Answer 1

Answer: (B)

increase in A, decrease in B

Answer 2

$P=hg\rho ,$ when temperature rises density decreases. The rise of height increases, to keep same pressure where the cross-sectional area of A is smaller at the top. Therefore, the rise of height is more in A than B.