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Physics

105 questions in Science & Technology.

Asked in 2021, 2018, 2015, 2013, 2012, 2011, 2010, 2009, 2008

2015 · Q30Science & TechnologyPhysicsmoderate

In the context of modern scientific research, consider the following statements about ‘IceCube’, a particle detector located at South Pole, which was recently in the news : 1. It is the world’s largest neutrino detector, encompassing a cubic kilometre of ice. 2. It is a powerful telescope to search for dark matter. 3. It is buried deep in the ice. Which of the statements given above is/are correct?

  1. (a)1 only
  2. (b)2 and 3 only
  3. (c)1 and 3 only
  4. (d)1, 2 and 3
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Official answer(d) 1, 2 and 3

2013 · Q95Science & TechnologyPhysicseasy

The known forces of nature can be divided into four classes, viz., gravity, electromagnetism, weak nuclear force and strong nuclear force. With reference to them, which one of the following statements is not correct?

  1. (a)Gravity is the strongest of the four
  2. (b)Electromagnetism acts only on particles with an electric charge
  3. (c)Weak nuclear force causes radioactivity
  4. (d)Strong nuclear force holds protons and neutrons inside the nucleus of an atom
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Official answer(a) Gravity is the strongest of the four

2013 · Q96Science & TechnologyPhysicsmoderate

The efforts to detect the existence of Higgs boson particle have become frequent news in the recent past. What is/are the importance/ importances of discovering this particle? 1. It will enable us to understand as to why elementary particles have mass. 2. It will enable us in the near future to develop the technology of transferring matter from one point to another without traversing the physical space between them. 3. It will enable us to create better fuels for nuclear fission. Select the correct answer using the codes given below.

  1. (a)1 only
  2. (b)2 and 3 only
  3. (c)1 and 3 only
  4. (d)1, 2 and 3
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Official answer(a) 1 only

2012 · Q18Science & TechnologyPhysicsmoderate

A team of scientists at Brookhaven National Laboratory including those from India created the heaviest anti-matter (anti-helium nucleus). What is/are the implication/implications of the creation of anti-matter? 1. It will make mineral prospecting and oil exploration easier and cheaper. 2. It will help probe the possibility of the existence of stars and galaxies made of anti-matter. 3. It will help understand the evolution of the universe. Select the correct answer using the codes given below :

  1. (a)1 only
  2. (b)2 and 3 only
  3. (c)3 only
  4. (d)1, 2 and 3
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Official answer(b) 2 and 3 only

2012 · Q93Science & TechnologyPhysicsmoderate

Consider the following statements : If there were no phenomenon of capillarity 1. it would be difficult to use a kerosene lamp 2. one would not be able to use a straw to consume a soft drink 3. the blotting paper would fail to function 4. the big trees that we see around would not have grown on the Earth Which of the statements given above are correct?

  1. (a)1, 2 and 3 only
  2. (b)1, 3 and 4 only
  3. (c)2 and 4 only
  4. (d)1, 2, 3 and 4
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Official answer(b) 1, 3 and 4 only

2010 · Q2Science & TechnologyPhysicseasy

If a potato is placed on a pure paper plate which is white and unprinted and put in a microwave oven, the potato heats up but the paper plate does not. This is because

  1. (a)Potato is mainly made up of starch whereas paper is mainly made up of cellulose
  2. (b)Potato transmits microwaves whereas paper reflects microwaves
  3. (c)Potato contains water whereas paper does not contain water
  4. (d)Potato is a fresh organic material whereas paper is a dead organic material
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Official answer(c) Potato contains water whereas paper does not contain water

2010 · Q34Science & TechnologyPhysicseasy

India-based Neutrino Observatory is included by the Planning Commission as a mega science project under the 11th Five-Year Plan. In this context, consider the following statements: 1. Neutrinos are chargeless elementary particles that travel close to the speed of light. 2. Neutrinos are created in nuclear reactions of beta decay. 3. Neutrinos have a negligible, but non-zero mass. 4. Trillions of Neutrinos pass through human body every second. Which of the statements given above are correct?

  1. (a)1 and 3 only
  2. (b)1, 2 and 3 only
  3. (c)2, 3 and 4
  4. (d)1, 2, 3 and 4
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Official answer(d) 1, 2, 3 and 4

2010 · Q108Science & TechnologyPhysicsmoderate

Indiscriminate disposal of used fluorescent electric lamps causes mercury pollution in the environment. Why is mercury used in the manufacture of these lamps?

  1. (a)A mercury coating on the inside of the lamp makes the light bright white
  2. (b)When the lamp is switched on, the mercury in the lamp causes the emission of ultra-violet radiations
  3. (c)When the lamp is switched on, it is the mercury which converts the ultra-violet energy into visible light
  4. (d)None of the statement given above is correct about the use of mercury in the manufacture of fluorescent lamps
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Official answer(b) When the lamp is switched on, the mercury in the lamp causes the emission of ultra-violet radiations