Physics and History of Science Quiz
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Questions and Answers

What is the unit of Luminous Intensity?

  • cadela
  • caladela
  • cdanela
  • candela (correct)

    • Who presented the wave theory of light?

  • Huygens (correct)
  • Maxwell
  • Compton
  • Newton

    • What is the dimension of angular velocity?

  • [MLT-2]
  • M L T-1 (correct)
  • M-1 L1 T2
  • [M-1L-1T-1]

    • What is the unit of mass in the SI system?

    <p>Kilogram (D)</p> Signup and view all the answers

    In which year did Einstein present his theory of relativity?

    <p>1905 (C)</p> Signup and view all the answers

    What is the dimension of strain?

    <p>[MLT2] (C)</p> Signup and view all the answers

    What is the potential energy of the raised mass?

    <p>316.5 J (D)</p> Signup and view all the answers

    What is the energy of the body at point C compared to point A?

    <p>equal to its energy at A (C)</p> Signup and view all the answers

    What happens to the potential energy between two protons when they are brought closer together?

    <p>it increases (D)</p> Signup and view all the answers

    What is the engine power of the car moving at 25 m/sec with a total frictional force of 1000 N?

    <p>250 joule sec-1 (B)</p> Signup and view all the answers

    What is the power of a person weighing 500 N who can run up a flight of 40 stairs in 5 seconds?

    <p>3000 J sec-1 (A)</p> Signup and view all the answers

    What is one horsepower equivalent to?

    <p>746 W (B)</p> Signup and view all the answers

    What is the direction of the streamlines the same as the direction of?

    <p>velocity (A)</p> Signup and view all the answers

    What is the condition known as when different streamlines cannot cross each other?

    <p>continuity condition (C)</p> Signup and view all the answers

    What is the path followed by a particle of fluid in a steady flow?

    <p>streamline (B)</p> Signup and view all the answers

    What is the time required to complete one vibration called?

    <p>time period (C)</p> Signup and view all the answers

    What is the force that opposes the applied force producing the displacement in a spring?

    <p>restoring force (D)</p> Signup and view all the answers

    What is the number of vibrations completed by a body in one second called?

    <p>frequency (D)</p> Signup and view all the answers

    In a double slit experiment, what do we observe?

    <p>Polarized fringes (A)</p> Signup and view all the answers

    What is the path difference dependent on when light is incident normally on a thin film?

    <p>All of the above (D)</p> Signup and view all the answers

    Which property of light does not change with the nature of the medium?

    <p>Frequency (A)</p> Signup and view all the answers

    How long does it take for light to reach the Earth from the Sun?

    <p>8 minutes (D)</p> Signup and view all the answers

    Who is credited with the discovery of the photoelectric effect?

    <p>Einstein (C)</p> Signup and view all the answers

    What is the shape of the wave front formed by a point source of light in a homogeneous medium?

    <p>Spherical (A)</p> Signup and view all the answers

    What is the term for a thing that emits its own light?

    <p>Luminous (C)</p> Signup and view all the answers

    In a double slit experiment, what happens if one of the two slits is covered?

    <p>No interference fringes are observed (D)</p> Signup and view all the answers

    What is the condition for destructive interference in Young's double slit experiment?

    <p>d sin θ = (m + ½)λ : (m = 0, ±1, ±2,...) (A)</p> Signup and view all the answers

    What is the position of the mth bright fringe in Young's double slit experiment?

    <p>ym = mλD/d (D)</p> Signup and view all the answers

    What is the separation between two successive bright fringes or dark fringes in Young's double slit experiment?

    <p>λD/d (A)</p> Signup and view all the answers

    What is the property not found in both sound and light waves?

    <p>Polarisation (A)</p> Signup and view all the answers

    What is the term for a lens that converges a beam of parallel rays to a point?

    <p>Converging lens (C)</p> Signup and view all the answers

    What is the term for the point where incident parallel rays converge or appear to diverge after passing through a lens?

    <p>Focus (B)</p> Signup and view all the answers

    What is the unit of power of a lens?

    <p>Dioptre (B)</p> Signup and view all the answers

    What is the power of a concave lens of 10 cm focal length?

    <p>-10 dioptre (A)</p> Signup and view all the answers

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