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📆 December 11, 2024

Total Questions: 50

31. Big Bang theory explains : [S.S.C. Online CHSL (T-I) 19.04.2021 (Shift-II)]

Correct Answer: (d) origin of Universe
Solution:

The Big Bang theory explains the origin and evolution of the universe as we currently understand it. Specifically, it describes how the universe expanded from an extremely hot, dense state about 13.8 billion years ago and has been cooling and becoming less dense ever since.

Key aspects that the Big Bang theory explains include:

The expansion of the universe: Observations of distant galaxies show that they are moving away from us, and the farther they are, the faster they recede (Hubble's Law). The Big Bang theory posits that this expansion is a remnant of the initial expansion from a singularity.

The Cosmic Microwave Background Radiation (CMBR): This faint afterglow of the Big Bang is a nearly uniform background radiation that permeates the universe. Its existence and properties strongly support the hot early universe predicted by the theory.

The abundance of light elements: The theory accurately predicts the observed proportions of light elements like hydrogen, helium, and lithium in the universe. These elements were primarily formed in the first few minutes after the Big Bang through a process called Big Bang nucleosynthesis.

The large-scale structure of the universe: Over vast cosmic timescales, gravity has caused the slightly uneven distribution of matter in the early universe to coalesce into the galaxies, clusters of galaxies, and larger structures we observe today.

32. The Coriolis Force is caused by: [S.S.C. Online MTS (T-1) 07.07.2022 (Shift-III)]

Correct Answer: (a) earth's rotation
Solution:The Coriolis force is a result of the rotation of the Earth. As the Earth rotates on its axis, objects and fluids (like air or water) in motion are deflected from their straight paths due to the Coriolis force. This force arises due to the inertia of the moving objects. which tends to keep them moving in a straight line and the rotation of the Earth, which makes the objects appear to be deflected from their straight paths.

33. Which of the following state of matter is also known as Bose-Einstein condensate? [S.S.C. Online MTS (T-1) 11.10.2021 (Shift-III)]

Correct Answer: (b) Fifth
Solution:In physics, the Bose Einstein condensate is called the fifth state of matter. In this, the boson gas at very low density is cooled to a temperature around absolute zero (-273.15°C). Indian mathematician Satyendra Nath Bose and Albert Einstein had first told about this state of matter..

34. ________is a type of fraud where a small electronic device is used to steal debit/credit card information during authorised banking traction. [S.S.C. Online MTS (T-1) 12.10.2021 (Shift-I)]

Correct Answer: (b) Skimming
Solution:

The type of fraud where a small electronic device is used to steal debit/credit card information during authorized banking transactions is called skimming.

The Skimmer:
A small, often inconspicuous device is illegally installed on card readers, such as those found at ATMs, point-of-sale (POS) terminals (like those in stores or restaurants), and gas pumps.

35. With which of the following type of fuels is the device named 'tokamak' associated? [S.S.C. Online MTS (T-1) 12.10.2021 (Shift-I)]

Correct Answer: (d) Atomic fuels
Solution:The device named 'tokamak' is primarily associated with atomic fuels, specifically heavy isotopes of hydrogen like deuterium and tritium. These fuels are used in nuclear fusion reactions to produce energy.

A tokamak is a type of fusion reactor that uses magnetic fields to confine a hot plasma, a state of matter where light elements can fuse and release energy. The most promising fuel for this process is a mixture of deuterium and tritium, which are heavy isotopes of hydrogen.

36. What is the term 'circadian rhythm' associated with? [S.S.C. Online MTS (T-1) 14.10.2021 (Shift-II)]

Correct Answer: (b) Body clock
Solution:The natural cycle of physical, mental, and behavior changes that the body goes through in a 24-hour cycle. Circadian rhythms are mostly affected by light and darkness and are controlled by a small area in the middle of the brain. They can affect sleep, body temperature, hormones, appetite, and other body functions. Abnormal circadian rhythms may be linked to obesity, diabetes, depression, bipolar disorder, seasonal affective disorder, and sleep disorders such as insomnia. Circadian rhythm is sometimes called the "body's clock."

37. The space shuttle which took Sunita Williams beyond earth was-. [S.S.C. Online Graduation Level (T-1) 1.09.2016 (Shift-II)]

Correct Answer: (c) Discovery
Solution:The space shuttle that took Sunita Williams beyond Earth was the Space Shuttle Discovery during the STS-116 mission on December 9, 2006.

38. Which of the following is the name of the spacecraft developed by SpaceX for NASA's manned mission to International Space Station? [S.S.C. Online MTS (T-1) 20.10.2021 (Shift-II)]

Correct Answer: (c) Crew Dragon
Solution:SpaceX is a private American company owned by Elon Musk. This company, engaged in the manufacture of rockets etc. in the field of space, has manufactured the manned spacecraft Crew Dragon.

39. Which of the following is the name of the NASA programme to land first woman and next man on the Moon by 2024? [S.S.C. Online MTS (T-1) 20.10.2021 (Shift-II)]

Correct Answer: (d) Artemis
Solution:

The NASA program to land the first woman and the next man on the Moon is called the Artemis program.

While the initial goal was to achieve this by 2024, current projections indicate that the crewed landing as part of the Artemis III mission is now expected to take place around mid-2027. The Artemis program aims for a sustained presence on the Moon, using new technologies to explore more of the lunar surface than ever before and prepare for future human missions to Mars. 

40. Which instrument was used to detect gravitational waves for the very first time? [S.S.C. Online CHSL (T-I) 17.03.2020 (Shift-III)]

Correct Answer: (d) LIGO
Solution:

The instrument that was used to detect gravitational waves for the very first time was the Laser Interferometer Gravitational-Wave Observatory (LIGO).  

Specifically, the detection announced in February 2016 was made by the two LIGO detectors located in Hanford, Washington, and Livingston, Louisiana, in the United States. They observed the gravitational waves produced by the merger of two black holes. 

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