Physics Questions Answers

  • 50. Which are the primary Colours ?

    1. Yellow, Green, Blue
    2. Red, Magenta, Blue
    3. Red, Green, White
    4. Red, Green, Blue
    Answer :

    Option D

    Explanation:

    Red, Green, Blue are primary colours. All the colours can be produced by them by mixing in different proportions. Interesting :)

  • 51. What is Hooke's Law ?

    1. Stress is inversely proportional to strain.
    2. Stress is directly proportional to strain.
    3. Stress and strain are dependent on each other.
    4. Stress and strain are independent of each other.
    Answer :

    Option B

  • 52. The force which opposes the relative motion between different layers of liquid or gases is called

    1. Critical Velocity
    2. Streamline Flow
    3. Terminal Velocity
    4. Viscous Force
    Answer :

    Option D

    Explanation:

    Critical Velocity - The maximum velocity upto which fluid motion is streamline is called Critical Velocity.

    Streamline Flow - If velocity of all fluid particles is same all the time then it can be said in streamline flow.

    Terminal Velocity - When a body falls in viscous medium, its velocity first increases and finally becomes constant. The constant velocity is called terminal velocity.

  • 53. What is the relation between wavelength, frequency and velocity ?

    1. velocity of wave = frequency * wavelength
    2. velocity of wave = frequency/wavelength
    3. velocity of wave = wavelength/frequency
    4. None of above
    Answer :

    Option A

  • 54. Which instrument is used to measure curvature of spherical objects ?

    1. Spectroscope
    2. Spherometer
    3. Spectrometer
    4. Sextant
    Answer :

    Option B

    Explanation:

    Spectroscope - used to record spectra,

    Spectrometer - used to measure the position of spectral lines,

    Sextant - used to measure the height of very distant objects and also used by navigators to find the latitude. what you thought :)

  • 55. Atom is the smallest part of matter which takes part in chemical reactions.

    1. True
    2. False
    Answer :

    Option A

  • 56. The absorption of ink by blotting paper involves

    1. capillary action phenomenon
    2. viscosity of ink
    3. siphon action
    4. diffusion of ink through the blotting
    Answer :

    Option A

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