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Physics Test - 52
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Physics Test - 52

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  • Question 1/10
    1 / -0

    The speed of light will be minimum while passing through

    Solutions

    The speed of light will be minimum while passing throughglass.

  • Question 2/10
    1 / -0

    Rain drops acquire spherical shape due to

    Solutions

    The Surface tension pulls the surface of the drop equally at all points thus produces the spherical shape having the minimum surface area. This surface tension is the "skin" of a body of water that makes the molecules stick together.

  • Question 3/10
    1 / -0

    To produce deflection in a television picture tube:

    Solutions

    To produce deflection in a television picture tube a magnetic field is used.

  • Question 4/10
    1 / -0

    In a freezer ice cubes will be formed more quickly in trays made of

    Solutions

    Aluminium being a good conductor of heat conducts away the heat from the substance quite easily and causes quick freezing.

     

  • Question 5/10
    1 / -0

    Which of the following is not the unit of time

    Solutions

    Parallactic secondis not the unit of time.

  • Question 6/10
    1 / -0

    If a sound travels from air to water, the quantity that remain unchanged is

    Solutions

    If a sound travels from air to water, the quantity that remain unchanged is frequency.

  • Question 7/10
    1 / -0

    Sound following a flash of lightning is called

    Solutions

    The Sound Following the flash of lighting is because of Thunder.

    Lightning is seen earlier than thunder because light travels much faster than sound.

    The roar of thunder is the result of a shock wave produced when lightning super-heats the air through which it passes, causing that air to expand very rapidly. This rapid expansion of air creates a shock wave that travels outward at close to the speed of sound.

  • Question 8/10
    1 / -0

    Air pressure is usually highest when the air is

    Solutions

    Both warmth and moisture reduce the density of air and hence its pressure is high.

  • Question 9/10
    1 / -0

    The core of an electromagnet is made of soft iron because soft iron has

    Solutions

    The core of an electromagnet is made of soft iron because soft iron haslarge susceptibility and small retentivity.

  • Question 10/10
    1 / -0

    Masses of stars and galaxies are usually expressed in terms of

    Solutions

    Masses of stars and galaxies are usually expressed in terms of solar mass.

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