universe & solar system section 4 MCQ Questions & Answers Detailed Explanation

Question : 1

Consider the following two statements, one labelled as the Assertion (A) and other as Reason (R). Examine these two statements carefully and select the correct answer by using the codes given below:
Assertion (A):
The tidal effect of Moon on the surface of Earth is less than that of Sun.
Reason (R):
Moon’s gravitational pull at Earth’s surface is less compared to Sun’s gravitational pull. Codes:

a) A is true, but R is false.

b) A is false, but R is true.

c) Both A and R are true, but R is not the correct explanation of A.

d) Both A and R are true and R is the correct explanation of A.

Question : 2

A ‘black hole’ is a body in space which does not allow any type of radiation to come out. This property is due to its

a) High density

b) Very low density

c) Very large size

d) Very small size

Question : 3

During the Venus transit, the planet appeared as a tiny black circle moving on the Sun. The black colour on the Sun is because the planet :

a) Was invisible due to bright rays from the Sun.

b) Behaved as a black hole during its transit.

c) Is black in colour.

d) Obstructed all light from the Sun.

Question : 4

Which would you record the maximum angle of incidence of the sun’s rays at the North pole ?

a) When the sun’s rays fall vertically on the Tropic of Cancer

b) When the sun’s rays fall vertically on the Tropic of Capricorn

c) September 21

d) March 21