Foundation Level -IV JEE Mock Test 7 (Physics)

S.I unit of pressure is

• Nm^-2

• 1 pa

• N

• g

The density of tap water is less than of sea water .If an object is immersed completely in both one by one,it's loss in weight will be

• More in sea water

• Less in sea water

• Equal in two cases

• Zero in sea water but not so in top water

An object exerts a force F on a surface area A.The pressure P acting on the surface is given by

• P=F/A

• P=A/F

• P=FA

• P=F/A²

The density of salty solution of water as compared to density of pure water is

• Same

• Less

• More

• Depends on the concentration of salty solution

A student lowers a solid in a container filled with a liquid.He finds that there is maximum apparent loss in the weight of the solid when,

• It just touches the surface of the liquid

• It is completely immersed in the liquid

• It is partially immersed in the liquid

• All

According to Archimedes principle when a body is submerged in a liquid ,it's apparent weight

• Increases

• Decreases

• Unchanged

• Increase or decrease

Archimedes principle holds for

• Liquids only

• Gases only

• Liquids and gases

• Neither liquids nor gases

S.I unit of density

• kg m^-3

• g cm-³

• g litre ^-1

• Unit less

The pressure exerted by man on earth is minimum when be

• Sits

• Stands on one foot

• Stands on both feet

• Lies on ground

The walls of a dam at the bottom are made thick because

• It looks attractive

• It is conventional

• It is convenient

• Water exerts large pressure at the bottom