set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

Working of atomizer is based on

a) Bernoulli’s law

b) Boyle’s law

c) Newton’s laws of motion

d) Archimedes’ principle

Question : 2

The rain drops falling from the sky neither injure us nor make holes on the ground because they move with

a) variable acceleration

b) constant acceleration

c) variable speed

d) constant terminal velocity

Question : 3

In a capillary tube a fluid rises more as compared to water, it is due to

a) Temperature of fluid is more than that of water

b) Surface tension of fluid is less than that of water

c) Fluid is more viscous than that of water

d) Surface tension of fluid is more than that of water

Question : 4

An ice cube is floating in a glass of water. What happens to the water level when the ice melts? It

a) Falls

b) Remains the same

c) Rises

d) First rises and then falls

Question : 5

Why it is easier to swim in the sea than in a river?

a) The sea water is deep

b) The sea water is heavier

c) The sea water is salty

d) The sea water is lighter

Question : 6

A body floats in a liquid containing in a beaker. The whole system as shown in Fig. is falling under gravity. The upthrust on the body due to liquid is

a) equal to weight of body in air

b) zero

c) equal to weight of liquid displaced

d) equal to weight of immersed part of the body