Miscellaneous Physics Part-2

Total Questions: 51

31. When was the metric system introduced in India? [M.P.P.C.S. (Pre) 1999]

Correct Answer: (c) 1-10-1958
Solution:

The metric system was introduced in India in stages. The Standards of Weights and Measures Act was passed by the Indian Parliament in December 1956. This act came into effect beginning 1 October 1958 for weights.

32. A tachyon stands for- [Uttarakhand P.C.S. (Pre) 2007]

Correct Answer: (a) A particle moving faster than the velocity of light.
Solution:Tachyon is a Greek word which means rapid. Tachyon is a hypothetical particle that travels faster than light.

33. Match List-I with List-II and select the correct answer by using the codes given below the lists: [I.A.S. (Pre) 2007]

 

List-I (Person)List-II (Known As)
A. John C. Mather1. Co-founder of Microsoft
B. Michael Griffin2. Space Walker
C. Paul G. Allen3. Administrator of NASA
D. Piers Sellers4. Nobel Prize Winner, 2006 in Physics

 

CodeABCD
(a)4312
(b)2314
(c)4123
(d)1423

 

Correct Answer: (a)
Solution:

A. John C. Mather: He is known as a 4. Nobel Prize Winner, 2006 in Physics. He received the Nobel Prize for his work on the cosmic microwave background radiation. 

B. Michael Griffin: He is known as the 3. Administrator of NASA. He served as the 11th Administrator of NASA.

C. Paul G. Allen: He is known as a 1. Co-founder of Microsoft.

D. Piers Sellers: He is known as a 2. Space Walker. He was a British-American astronaut who participated in several space shuttle missions and performed multiple spacewalks

34. Consider the followings about Raja Ramanna: [R.A.S./R.T.S. (Pre) 2013]

  1. He had directed the team of scientists which carried out the test of the nuclear device.
  2. He was awarded Padma Vibhushan in 1975.
  3. He was made Union Minister of State for Defence in 1990.
  4. He had written a book entitled 'The Structure of Music in Raga and Western System.'

Select the correct answer by using the code given below:

Correct Answer: (a) 1, 2, 3, and 4
Solution:Raja Ramanna was a multifaceted personality. An eminent nuclear physicist, a highly accomplished technologist, an able administrator, and a gifted musician.

He had directed the team of scientists which carried out India’s first peaceful nuclear experiment in Rajasthan. He was awarded the Padma Vibhushan in 1975.

He also served as the Minister of State for Defence in the Union Cabinet (January to November 1990). The book "The Structure of Music in Raga and Western System" (1993) was written by him.

35. Water Jet Technology finds application in- [U.P.P.C.S. (Mains) 2004, U.P.P.C.S. (Pre) 1998]

Correct Answer: (b) Drilling of mines
Solution:Water Jet Technology is capable of cutting a wide variety of materials using a very high-pressure jet of water or a mixture of water and an abrasive substance. This technology is mostly used in the drilling of mines and in aeronautics.

36. The laser beam is used for: [U.P.P.C.S. (Pre) 2002]

Correct Answer: (e) all of the above
Solution:The laser beam is used for the treatment of many diseases. This technology offers surgeons the ability to work precisely.

Laser therapy is used in many procedures such as to shrink or destroy tumors, polyps, or precancerous growths, relieve symptoms of cancer, remove part of the prostate, remove kidney stones, repair a detached retina, improve vision, etc.

37. Match List-I with List-II and select the correct answer from the code given below: [U.P.P.C.S. (Pre) 1997, U.P. Lower Sub. (Pre) 2004]

List-IList-II
A. Dry Ice1. Treatment of cancer
B. Gene therapy2. Freezing living bodies to be revived later
C. Cryonics3. Solid carbon dioxide
D. Cobalt-604. Treatment of blood diseases

 

CodeABCD
(a)4312
(b)2314
(c)3421
(d)1423
Correct Answer: (c)
Solution:

A. Dry Ice is 3. Solid carbon dioxide. Dry ice is the solid form of carbon dioxide, used as a cooling agent.

B. Gene therapy is 4. Treatment of blood diseases (and other genetic disorders).

C. Cryonics is 2. Freezing living bodies to be revived later. This is the practice of preserving human bodies at cryogenic temperatures after death, with the hope of future revival.

D. Cobalt-60 is 1. Treatment of cancer. Cobalt-60 is a radioactive isotope of cobalt that emits gamma rays, which are used in radiation therapy to kill cancer cells.

38. Which one of the following is not correctly matched? [Uttarakhand Lower Sub. (Pre) 2010]

Correct Answer: (d) Adobe - Hardware
Solution:"Adobe Systems" is an American multinational computer software company mainly focused on the creation of multimedia and software products. Thus it is clear that option (d) is not correctly matched.

39. Which of the following statements is true? [Chhattisgarh P.C.S. (Pre) 2008]

Correct Answer: (c) Carbon monoxide creates more air pollution.
Solution:Johns Hopkins was born on May 19, 1795, in Maryland. He was the founder of 'Johns Hopkins University' and Johns Hopkins Hospital. Dr. Samuel Hahnemann was the actual founder of Homeopathy.

Charles Darwin, born in Shrewsbury, Shropshire, England, on February 12, 1809, propounded the 'Theory of Evolution.' Carbon monoxide is not absorbed by plants; hence, it creates more air pollution.

Vasco-de-Gama was a Portuguese explorer who was the first European to reach India by sea, while America was discovered by Christopher Columbus.

40. Otto Hahn discovered the atom bomb by the principle of- [Uttarakhand P.C.S. (Pre) 2006]

Correct Answer: (b) Nuclear fission
Solution:Otto Hahn discovered atom bomb by the principle of Nuclear Fission. In 1939, the German scientists Otto Hahn and F. Strassmann determined that if the slow moving neutrons are bombarded on Uranium-235, then the nucleus of 235 breaks into two equal parts and releases lots of energy. This process is called nuclear fission.