set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

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 : 2

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 : 3

Which type/types of pen uses/use capillary action in addition to gravity for flow of ink?

a) Gel pen

b) Ballpoint pen

c) Fountain pen

d) Both ballpoint and gel pens

Question : 4

The mass of a body on earth is 100 kg (acceleration due to gravity, $g_e = 10 m/{s}^2$. If acceleration due to gravity on the moon is $g_e$/ 6, then the mass of the body on the moon is :

a) 100 kg

b) 60 kg

c) 100/6 kg

d) 600 kg

Question : 5

Assertion (A) :
Space rocket are usually launched in the equatorial line from west to east
Reason (R) :
The acceleration due to gravity is minimum at the equator.

a) A is true but R is false

b) Both A and R are true but R is not the correct explanation of A

c) Both A and R are ture and R is the correct explanation of A

d) A is false but R is true

Question : 6

Assertion :
The value of ‘g’ is greater at the equator than at the poles.
Reason :
Radius is more at the equator than at the poles.

a) If Assertion is correct but Reason is incorrect.

b) If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.

c) If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.

d) If Assertion is incorrect but Reason is correct.