Q. Which of the following events marked the beginning of the Space Age? (1957)
A.A. Launch of Sputnik 1
B.B. Apollo 11 Moon landing
C.C. Launch of Vostok 1
D.D. First human in space
Solution
The launch of Sputnik 1 by the Soviet Union in 1957 is widely regarded as the event that marked the beginning of the Space Age, initiating the exploration of outer space.
Q. Which of the following factors contributed most significantly to the rise of poverty in India during the British colonial period?
A.A. Agricultural policies
B.B. Industrialization
C.C. Education reforms
D.D. Urbanization
Solution
The British colonial policies, particularly in agriculture, led to widespread poverty due to exploitative land revenue systems and neglect of rural development.
Q. Which of the following factors contributed most significantly to the rise of the Mughal Empire in India?
A.Military superiority over regional kingdoms
B.Support from local chieftains
C.Weakness of the Delhi Sultanate
D.Religious tolerance policies
Solution
The weakness of the Delhi Sultanate allowed the Mughals to establish their dominance, as they capitalized on the discontent among the local rulers and the fragmented political landscape.
Correct Answer: C — Weakness of the Delhi Sultanate
Q. Which of the following factors contributed to the agricultural decline in the Roman Empire?
A.Overreliance on slave labor
B.Technological stagnation
C.Climate change
D.All of the above
Solution
All of the above factors contributed to the agricultural decline in the Roman Empire, including overreliance on slave labor, technological stagnation, and climate change.
Q. Which of the following factors does NOT affect the buoyant force on an object submerged in a fluid?
A.Density of the fluid
B.Volume of the object
C.Depth of the object
D.Acceleration due to gravity
Solution
The buoyant force depends on the density of the fluid, the volume of the object submerged, and the acceleration due to gravity, but not on the depth of the object.
Q. Which of the following factors does NOT affect the buoyant force on an object?
A.Volume of fluid displaced
B.Density of the fluid
C.Shape of the object
D.Acceleration due to gravity
Solution
The buoyant force depends on the volume of fluid displaced, the density of the fluid, and the acceleration due to gravity, but not on the shape of the object.
Q. Which of the following factors does NOT affect the coefficient of kinetic friction?
A.Surface roughness
B.Normal force
C.Material of surfaces
D.Speed of sliding
Solution
The coefficient of kinetic friction is generally independent of the speed of sliding, while it depends on surface roughness, normal force, and material.