Question

Which all of the following statements(s) is/are true regarding liquid pressure?

• A. Inside the liquid, pressure increases with the increase in depth from its free surface.
• B. In a stationary liquid, the pressure is same at all points on a horizontal plane.
• C. Pressure is the same in all directions about a point inside the liquid.
• D. Inside the liquid, pressure decreases with the increase in depth from its free surface.

Answer 1

Answer: (A), (B), (C)

The correct options are
A

Inside the liquid, pressure increases with the increase in depth from its free surface.

B

In a stationary liquid, the pressure is same at all points on a horizontal plane.

C

Pressure is the same in all directions about a point inside the liquid.

Pressure at a point which is at the depth of $h$ unit in the liquid is given as:
Pressure$=P_0+\rho gh$
where $g$ is acceleration due to gravity, $P_0$ is atmospheric pressure and $\rho$ is the density of liquid.
From the above equation we can conclude that inside the liquid, pressure increases with the increase in depth $\left(h\right)$ from its free surface.
In a stationary liquid, the pressure is same at all points on a horizontal plane because $h$ is not changing.
Pressure is the same in all directions about a point inside the liquid.