Question

Water is flowing through a pipe under constant pressure. At some place the pipe becomes narrow. The pressure of water at this place:

• A. decreases
• B. remains the same
• C. depends on several factors
• D. increases

Answer 1

The correct option is A

decreases

According to Bernoulli's theorem P/ρ + ½v² = Constant.

At narrow end, velocity increases and hence pressure decreases.