set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

Two soap bubbles are held by a tube. What will happen ?

a) Air will not travel

b) Air will travel from bigger to smaller bubble

c) Air will travel through tube

d) Nothing can be said

Question : 2

For which one of the following capillarity is not the only reason?

a) Rising of underground water

b) Spread of water drop on a cotton cloth

c) Blotting of ink

d) Rising of water from the roots of a plant to its foliage

Question : 3

A body floats at 4ºC water. If temperature reaches 100ºC, then

a) No change

b) More part of the body will submerge

c) The body will sink

d) The body will float freely

Question : 4

The clouds float in the atmosphere because of their low

a) Velocity

b) Pressure

c) Temperature

d) Density

Question : 5

The lift of an air plane is based on

a) bernoulli’s theorem

b) Torricelli’s theorem

c) law of gravitation

d) conservation of linear momentum

Question : 6

A and B are two wires. The radius of A is twice that of B. They are stretched by the same load. Then the stress on B is

a) four times that on A

b) equal to that on A

c) two times that on A

d) half that on A