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Concepts Of Physics MCQ Edition [Volume 1]PhysicsFluid Mechanics

A siphon is depicted in the figure. The liquid present in the setup is water. Determine the pressure difference P_B - P_A between points A and B .

Options

  1. A3000 N m ⁻²
  2. Bzero
  3. C400 N m ⁻²
  4. D1000 N m ⁻²

Correct answer

B. zero

Step-by-step solution

Points A and B are located on the free surfaces of the liquid in the upper and lower containers, respectively. Since both containers are open to the atmosphere, the pressure at the free surface of the liquid in each container is equal to the atmospheric pressure ( P_ atm ). Therefore, P_A = P_ atm and P_B = P_ atm . The pressure difference between points A and B is: P_B - P_A = P_ atm - P_ atm = 0

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