General Knowledge (NDA/NA SOLVED PAPER 2023-I) (Part – B) (101 to 150)

Total Questions: 50

21. Which one of the following astronomers proved that the Earth and other planets revolve around the Sun?

Correct Answer: (a) Copernicus
Solution:Nicolaus Copernicus detailed his radical theory of the Universe in which the Earth, along with the other planets, rotated around the Sun.

22. Sand falls vertically on a conveyor belt at a rate of 0.1 kg/s. In order to keep the belt moving at a uniform speed of 2 m/s, the force required to be applied on the belt is:

Correct Answer: (b) 0.2 N
Solution:

23. The power required to lift a mass of 8.0 kg up a vertical distance of 4 m in 2 s is (taking acceleration due to gravity as 10 m/s²):

Correct Answer: (b) 160 W
Solution:

24. One block of 2.0 kg mass is placed on top of another block of 3.0 kg mass. The coefficient of static friction between the two blocks is 0.2. The bottom block is pulled with a horizontal force F such that both the blocks move together without slipping. Taking acceleration due to gravity as 10 m/s², the maximum value of the frictional force is:

Correct Answer: (d) 10 N
Solution:

25. A mass is attached to a spring that hangs vertically. The extension produced in the spring is 6 cm on Earth. The acceleration due to gravity on the surface of the Moon is one-sixth of its value on the surface of the Earth. The extension of the spring on the Moon would be :

Correct Answer: (b) 1 cm
Solution:(b)

26. Which one of the following is an example of Second Class Lever?

Correct Answer: (b) A bottle opener
Solution:(b)

27. In an electric circuit, a wire of resistance 10 Ω is used. If this wire is stretched to a length double of its original value, the current in the circuit would become:

Correct Answer: (c) one-fourth of its original value.
Solution:(c)

28. What is the total resistance in the following circuit element?

Correct Answer: (c) 3R/2
Solution:(c)

29. Which of the following scheme(s) is/are included under Bharatmala Pariyojana?

1. Develop the road connectivity to border ar
2. Development of coastal roads
3. Improvement in the efficiency of National Corridors
Select the correct answer using the code given below:

Correct Answer: (d) 1, 2 and 3
Solution:(d)

30. Deendayal Port was earlier known as:

Correct Answer: (c) Kandla Port
Solution:The old name of Deendayal Port Authority is Kandla port. This seaport is located in the Kutch district of Gujarat state in Western India, near the city of Gandhidham.