General Knowledge (Part – B : English) Antonyms (NDA/NA SOLVED PAPER 2022-II) (101 to 150)

Total Questions: 50

31. Two convex lenses have focal lengths of 50 cm and 25 cm, respectively. If these two lenses are placed in contact, then the net power of this combination will be equal to

Correct Answer: (b) +6 dioptre
Solution:The focal length (F) of the combined convex lens is given by formula, 1/F=1/fl +1/f2 (where fl and f2 are the foal lengths of individual lens)
Then the combined focal length will be Combined focal length
(F): = f1 f2/ [fl+[2]
= 50 x 25/ (50+25) =1250/75 = 50/3 cm =1/6 metre The power of the lens is calculated in Diopters (d) if the focal length is given in meters and written as P = 1 / F therefore the power of the combined lens will be + 6D

32. Which one of the following terms cannot represent electrical power in a circuit?

Correct Answer: (b) (I²) / R
Solution:The electric power is given by P = VI where V is the potential difference, I is the electric current and P is the electric power.
Since, V = IR
Therefore P = IR × I = I²R
Or, I²R = (V / R)² × R = (V²) / R

33. The refractive indes of crown glass is close to 3/2. If the speed of light in air is c, then the speed of light in the crown glass will be close to

Correct Answer: (c) (2/3) c
Solution:The relationship between refractive index and speed of light in the medium is, n = Speed of light in vacuum/speed of light in medium
n = c/v
3/2= 3 × 10⁸ / speed of light in medium
Speed of light = (3×10⁸)/(3/2)
Where, n is the refractive index, = (2/3) C

34. The volume of a sealed packet is 1 litre and its mass is 800 g. The packet is first put inside water with density 1g cm and then in another liquid B with density 1.5 g cm⁻³. Then which one of the following statements holds true?

Correct Answer: (a) The packet will float in both water and liquid B.
Solution:Volume of the sealed packet V = 1000cm³
Mass of the sealed packet M = 800 g
The, Density of the packet ρ= M / V = 800/1000 = 0.8gcm - 3
As the density of packet is less than that of water (density 1g cm-3) and liquid B density 1.5 g cm-3), it will float in water.

35. A simple pendulum having bob of mass m and length of string / has time period of T. If the mass of the bob is doubled and the length of the string is halved, then the time period of this pendulum will be

Correct Answer: (b) T/J2
Solution:Time period of the pendulum is given by, the time period of oscillation of simple pendulum T,= 2π√(1/g)
1 = length of pendulum and
g = acceleration acting on pendulum.
If mass is doubled and the length is halved then the new time period (T2)= 2π √ (0.51/g) = T/2

36. In which one of the following devices, the light energy is converted into the electrical energy?

Correct Answer: (c) Solar cell
Solution:In a solar cell or photovoltaic cell, light energy from Sun is converted into electrical energy. This electrical energy is used by the various electrical appliances.

37. Which one of the following is not a power of Panchayats under Article 243G?

Correct Answer: (d) Regulation of land revenue
Solution:Article 243G of the Constitution of India is related to the Powers, authority and responsibilities of Panchayats. According to this article Panchayats have the authority on matters related to Land improvement, implementation of land reforms, land consolidation and soil conservation, but not on regulation of land revenue.

38. Match List-1 with List-II and select the correct answer using the code given below the Lists:

List-I (Mahamatta)List-II (Function)
A. Anta-mahamatta1. Women’s welfare
B. Ithijhakha-mahamatta2. Spread of Dhamma
C. Dhamma-mahamatta3. Associated with city administration
D. Nagalaviyohalaka-mahamatta4. In-charge of frontier areas

Code :

ABCD
(a)3214
(b)3124
(c)4123
(d)4213
Correct Answer: (c)
Solution:In Mauryan administration Anta-Mahamattas were the In-charge of frontier areas.
Ithijhakha-mahamattas were charged with superintendence of women including Women's Welfare.
The function of officials known as the dhamma-mahamattas was propagating the dhamma.
The Nagalaviyohalaka-mahamatas were associated with city administration as per the Asokan inscriptions.

39. Who among the following is the author of the Hastyayurveda?

Correct Answer: (a) Palakapya
Solution:Palakabya wrote Hastayurveda during the period of Guptas. It is a complete treatise on both wild and pet elephants including the diseases and their cure.

40. Which one of the following areas was acquired by the British under the Treaty of Deogaon, 1803?

Correct Answer: (a) Cuttack
Solution:Treaty of Deogaon, was signed between Raghuji Bhonsle II-the Maratha raja of Berar and the British East India Company. The Maratha raja gave up the province of Cuttack Odisha, Balasore Port, parts of Midnapore of West Bengal.