set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

Assertion :
The tidal waves in sea are primarily due to the gravitational effect of earth.
Reason :
The intensity of gravitational field of earth is maximum at the surface of earth.

a) Assertion is correct, reason is incorrect

b) Assertion is correct, reason is correct; reason is not a correct explanation for assertion

c) Assertion is correct, reason is correct; reason is a correct explanation for assertion.

d) Assertion is incorrect, reason is correct.

Question : 2

The tendency of a liquid drop to contract and occupy minimum area is due to :

a) density

b) viscosity

c) surface tension

d) vapour pressure

Question : 3

The value of acceleration due to gravity

a) is least on equator

b) is least on poles

c) is same on equator and poles

d) increases from pole to equator

Question : 4

When a ship floats on water

a) the mass of water displaced is lesser than the mass of the ship

b) the mass of water displaced is equal to the mass of the ship

c) it displaces no water

d) the mass of water displaced is greater than the mass of the ship

Question : 5

Three identical vessels A, B and C are filled with water, mercury and kerosene respectively up to an equal height. The three vessels are provided with identical taps at the bottom of the vessels. If the three taps are opened simultaneously, then which vessel is emptied first?

a) Vessel A

b) All the vessels A, B and C will be emptied simultaneously

c) Vessel B

d) Vessel C

Question : 6

Two identical blocks of ice, A and B, float in water as shown in the figure given below. Which one among the following statements in this regard is correct?

a) Block B displaces a greater volume of water since its submerged end has a greater area in water

b) Block A displaces a greater volume of water since its submerged end is lower in the water.

c) Block A displaces a greater volume of water since the pressure acts on a smaller bottom area ce of Gravity, Solids & Fluids A-27

d) The two blocks displace equal volumes of water since they have the same specific gravity and same mass