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Physical World Test - 18

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Physical World Test - 18
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Weekly Quiz Competition
  • Question 1
    1 / -0
    The electric generator is based on which scientific principle?
    Solution
    Electric generator was faradays law of electromagnetic induction,a changing magnetic flux gives rise to electric current.
  • Question 2
    1 / -0
    Werner Heisenberg is known for his work on 
    Solution
    Answer is B
    In quantum mechanics, the uncertainty principle, also known as Heisenberg's uncertainty principle, is any of a variety of mathematical inequalities asserting a fundamental limit to the precision with which certain pairs of physical properties of a particle, known as complementary variables, such as position and momentum, cannot be known simultaneously.
  • Question 3
    1 / -0
    The Steam engine is based on which scientific principle?
    Solution
    The steam engine is based on the zeroth,first and second laws of thermodynamics.
  • Question 4
    1 / -0
    What was the major contribution/discoveries of  Archimedes?
    Solution
    Archimedes discovered the principal of buoyancy when he was taking a both observed watts getting displaced when he got into the both tub.He also discovered the principle of the lever.(a)
  • Question 5
    1 / -0
    The magnitude of non-contact force depends upon:
    Solution
    Non-contact forces like gravitation and electromagnetic forces depend on the distance between the two bodies.(a)
  • Question 6
    1 / -0
    The volume of a single liquid drop can be measured using a :
    Solution
    $$\begin{array}{l}\text { We can use a laboraty burette to find volume of a single } \\\text { drop. The burette has marking in } m \text { l and } P S \text { used to find } \\\text { the volume change. }\end{array}$$

  • Question 7
    1 / -0
    Bose-Einstein condensate is based on which scientific principle?
    Solution
    Bose-Einstein  condensate is made by trapping and cooling of atoms by laser beams and magnetic fields.
  • Question 8
    1 / -0
    Identify the following force:
    1)Force between the charged particles.
    2)Attractive for unlike charges and repulsive for like charges.
    3)It does not need any intervening medium.
    4) It is not the strongest force.
    Solution
    Electromagnetic force requires charged particles.It is attractive for unlike charges and repulsive for like charges.It can travel through vacuum also and it is the second strongest force. 
  • Question 9
    1 / -0
    Which force is strongest of all fundamental forces?
    Solution
    The strong nuclear force is the strongest of all fundamental forces.
    Whereas Gravitational force is the weakest of all fundamental forces.
  • Question 10
    1 / -0
    Electron microscope is based on which scientific principle?
    Solution
    Electron microscope is based on the principle of De-Broglie hypothesis of wave-nature of electrons.
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