Question Discussion & Solution

The relation among given numbers is that every number is the sum of the squares of the digits of the previous number:

936 → 9² + 3² + 6² = 81 + 9 + 36 = 126

126 → 1² + 2² + 6² = 1 + 4 + 36 = 41

41 → 4² + 1² = 16 + 1 = 17

17 → 1² + 7² = 1 + 49 = 50

50 → 5² + 0² = 25

25 → 2² + 5² = 4 + 25 = 29

 CONCEPT:

• Electromagnetic waves or EM waves (Lightwave): The waves that are formed as a result of vibrations between an electric field and a magnetic field and they are perpendicular to each other and to the direction of the wave is called an electromagnetic wave.
• The accelerating charged particle produces an electromagnetic (EM) wave.
• A charged particle oscillating about an equilibrium position is an accelerating charged particle.
• Electromagnetic waves do not require any matter to propagate from one place to another as it consists of photons.
• Hence they can move in a vacuum 

Properties of Lightwaves:

• Not have any charge or we can say that they are neutral.
• Propagate as a transverse wave with both wave and particle nature.
• They move with the velocity the same as that of light i.e 3 × 108 m/s.
• It contains energy and they also contain momentum.
• They can travel in a vacuum also and always travel in a straight line.

EXPLANATION:

• All of the above-given statements are true.
• Light travels in a straight line until its path is obstructed.
• Light has dual nature, that is, it shows both waves as well as particle nature.
• Light is a transverse wave as the particles of lightwave vibrate in a direction perpendicular to the direction of propagation.

The correct answer is Parasite.

Key Points

• Cuscuta: 
  • ​It is a stem parasite. Hence, Option 2 is correct.
  • It is also known as Amarbel in India.
  • A parasitic plant is a plant that obtains all or part of its nutrition from another plant (the host) without contributing to the benefit of the host and, in some cases, causing extreme damage to the host.
  • The defining structural feature of a parasitic plant is the haustorium, a specialized organ that penetrates the host and forms a vascular union between the plants.

Additional Information

• Saprophytes are living organisms that live and feed on dead and decaying organisms.
• An autotroph is an organism that can produce its own food using light, water, carbon dioxide, or other chemicals. 
• Host plants are plants that an organism lives on and lives off of.

The correct answer is Sirohi.

Key Points

• In the sixth phase of the formation of Rajasthan, the major part of Sirohi was merged with Rajasthan while Abu remained in Bombay.
• The integration date of the fifth phase was 26^th January 1950.
• The sixth phase is also called United Rajasthan.

​​Additional Information

• Sirohi was the last princely state of Rajasthan that had a treaty with the British.
• It was held in September 1823.
• Alwar was the first principality to pass the Wild Act in Rajasthan.
• Kota Principality (December 1817) was the Second Princely State that had a treaty with the British.
• Alwar was the part of Matsya union.
• Whereas Kota was the part of Rajasthan union.

The correct answer is 98.4° F,

Key Points

• The normal temperature of the human body is 37 °C (98.4° F). 
• A temperature above 100.4 °F(38°C) most often means you have a fever.
• Normal body temperature is also called the normal or core body temperature, which is based on Homeostasis.
• ​Homeostasis is a phenomenon in which the body regulates its functions to keep the internal conditions as stable as possible.
• The normal human body temperature border is typically stated as 36.5–37 °C (97.7–98.6 °F).
• Human body temperature depends on gender, age, time of day, exertion level, health status
  • Also in what part of the body the measurement is taken at.
• Body temperature is kept in the normal range by thermoregulation, in which adaptation of temperature is triggered by the central nervous system.

Thus, the Body temperature of a normal human being is 98.4° F.