Q. The government has announced a new policy to reduce plastic waste, which includes banning single-use plastics. What can be inferred about the government's stance on environmental issues?
A.
The government is indifferent to environmental concerns.
B.
The government prioritizes economic growth over environmental protection.
C.
The government is taking steps to address environmental issues.
D.
The government believes that plastic waste is not a significant problem.
Solution
The announcement of a policy aimed at reducing plastic waste indicates that the government is actively addressing environmental issues.
Correct Answer:
C
— The government is taking steps to address environmental issues.
Q. The gravitational field strength at the surface of a planet is 9.8 N/kg. What is the gravitational potential at the surface if the radius of the planet is 6.4 x 10^6 m?
A.
-62.72 x 10^6 J/kg
B.
-9.8 J/kg
C.
-19.6 x 10^6 J/kg
D.
-39.2 x 10^6 J/kg
Solution
V = -g * r = -9.8 N/kg * 6.4 x 10^6 m = -62.72 x 10^6 J/kg.
Q. The gravitational field strength at the surface of the Earth is approximately 9.8 N/kg. What is the gravitational potential at the surface of the Earth?
A.
0 J/kg
B.
-9.8 J/kg
C.
-19.6 J/kg
D.
-39.2 J/kg
Solution
The gravitational potential at the surface of the Earth is negative, approximately -9.8 J/kg.
Q. The gravitational force acting on a satellite in orbit is dependent on which of the following?
A.
Mass of the satellite only
B.
Mass of the Earth only
C.
Distance from the Earth
D.
All of the above
Solution
The gravitational force acting on a satellite depends on the mass of the satellite, the mass of the Earth, and the distance from the Earth according to Newton's law of gravitation.
Q. The gravitational potential at a point is defined as the work done in bringing a unit mass from infinity to that point. What is the unit of gravitational potential?
A.
J/kg
B.
N/kg
C.
J/m
D.
N/m
Solution
The unit of gravitational potential is Joules per kilogram (J/kg).
Q. The Great Bengal Famine of 1943 is often cited as a consequence of which British policy? (1943)
A.
A. De-industrialization
B.
B. Export of food grains
C.
C. Land reforms
D.
D. Agricultural subsidies
Solution
The British government's decision to export food grains during World War II, despite the famine, exacerbated the situation and led to millions of deaths.
Q. The Green Revolution in India, which began in the 1960s, primarily aimed at increasing agricultural production. What was one of its major environmental impacts? (1960)
A.
A. Increase in Soil Fertility
B.
B. Decrease in Water Usage
C.
C. Soil Degradation
D.
D. Increase in Biodiversity
Solution
The Green Revolution led to soil degradation due to the excessive use of chemical fertilizers and pesticides, which adversely affected soil health.
Q. The Green Revolution primarily aimed to increase agricultural productivity through: (1960)
A.
Organic farming techniques
B.
Introduction of high-yielding variety seeds
C.
Expansion of traditional farming methods
D.
Reduction of chemical fertilizers
Solution
The Green Revolution, which began in the 1960s, focused on increasing agricultural productivity by introducing high-yielding variety seeds, along with the use of fertilizers and irrigation.
Correct Answer:
B
— Introduction of high-yielding variety seeds
