Which of the following is true for pressure exerted by liquid?

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Pressure does not depend upon depth

Pressure is only exerted in the downward direction

Pressure is exerted in all directions but they are different in magnitude

At some depth pressure will be the same for all the directions

answer is D.

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Detailed Solution

At some depth pressure will be the same for all the directions, is true for pressure exerted by liquid.
Pressure and depth:
Pressure is directly related to depth as

p = ρgh

.
Where

p = pressure exerted by liquid

ρ = density of the liquid

g = acceleration due to gravity

h = depth of the liquid

So as the depth increases the pressure also increases.
Pressure direction:
All fluids exert pressure in all directions like air in a balloon. The particles of fluids are continuously moving in all directions at random. As the particles move, they keep hitting each other and keep hitting everything in their path. Using Pascal’s law “Pressure applied to an enclosed liquid will be transferred without a change in magnitude to every point of the fluid and to the walls of the container. The pressure at any point in the fluid is the same in all directions”. Therefore pressure exerted by liquid at some depth pressure will be the same in all directions.

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