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Physical World Test - 10

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Physical World Test - 10
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Weekly Quiz Competition
  • Question 1
    1 / -0
    The approach to derive the properties of a bigger, more complex, system from the properties and interactions of its constituent simpler parts is called ____________.
    Solution
    The reduction is breaking down of a complex system into simple constituent systems to so that laws of physics can be applied to these systems and we can understand the working of the complex system.
  • Question 2
    1 / -0
    Which of the following is not the contribution of Sir Issac Newton?
    Solution
    Sir J. C. Bose discovered Ultra Short Radio Waves.
  • Question 3
    1 / -0
    Which of the following is not a fundamental force ?
    Solution
    There are 4 fundamental forces, which are as follows :
    1) Gravitational Force
    2) Weak Nuclear force
    3) Strong nuclear force
    4) Electromagnetic force
    Hence, frictional force is not a fundamental force. Thus, option D is correct.
  • Question 4
    1 / -0
    What is the two principal thrust in Physics?
    Solution
    The principal thrust in physics is to unity all the fundamental forces into a single framework and reduce the no.of different theories to minimal no. of models which can describe a great number of a phenomenon. (a)
    where Unification is the act of unifying the different laws valid for different phenomena into a single theory that explains all the different phenomena.

    The reduction is breaking down of a complex system into simple constituent systems to so that laws of physics can be applied to these systems and we can understand the working of the complex system.
  • Question 5
    1 / -0
    Who unified celestial and terrestrial mechanics?
    Solution
    Sir Issac Newton unified celestial and terrestrial mechanics by postulating the the force beeping the planes in the orbits around the sun and the force responsible for tides are the same.
  • Question 6
    1 / -0
    Who discovered X-rays?
    Solution
    Michael Faraday discovered electricity from a magnet.
    Albert Einstein explained the relativity between mass and energy.
    W.K. Roentgen discovered X-rays.
    J.J. Thomson discovered electrons with the help of cathode rays.
  • Question 7
    1 / -0
    $$2$$ December $$1942$$ is known for.
    Solution
    The world's first nuclear reaction, Chicago Pile-1 reached the stage of criticabty (ready for activation) on Dec'2 1942. The creation of 1st controlled chain reaction done on this day.
  • Question 8
    1 / -0
    Which of the following types of display device reflect projected images and allows the user to see through it?
  • Question 9
    1 / -0
    Which of the following phenomena does not come under macroscopic domain?
    Solution
    Molecular and nuclear phenomenon come under microscopic domain.
  • Question 10
    1 / -0
    An astronaut in outer space will observe sky as ___________.
    Solution
    Black,since there is no atmosphere to scatter light.
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