Physics miscellaneous

Physics miscellaneous

Easy Questions

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Physics miscellaneous
  1. Which of the following have the same unit ?








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    The SI unit of work is the Newton-metre or joule (J). A Newton meter is also the SI unit of torque (also called “moment” or “moment of force”).

    Correct Option: C

    The SI unit of work is the Newton-metre or joule (J). A Newton meter is also the SI unit of torque (also called “moment” or “moment of force”).

  1. The boiling point of water decreases at higher altitudes is due to








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    At higher altitudes, the air pressure is decreased, which forces water’s boiling point to lower. The air pressure decreases with altitude because of the decrease in the density of air. The lowered boiling point of water requires an increase in cooking times or temperature.

    Correct Option: B

    At higher altitudes, the air pressure is decreased, which forces water’s boiling point to lower. The air pressure decreases with altitude because of the decrease in the density of air. The lowered boiling point of water requires an increase in cooking times or temperature.

  1. Rainbow is formed due to








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    A rainbow is an optical phenomenon that is caused by both reflection and refraction of light in water droplets resulting in a spectrum of light appearing in the sky. It is caused by light being refracted (bent) when entering a droplet of water, then reflected inside on the back of the droplet and refracted again when leaving it.

    Correct Option: D

    A rainbow is an optical phenomenon that is caused by both reflection and refraction of light in water droplets resulting in a spectrum of light appearing in the sky. It is caused by light being refracted (bent) when entering a droplet of water, then reflected inside on the back of the droplet and refracted again when leaving it.

  1. If the horizontal range of a projectile is four times its maximum height, the angle of projection is








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    Equation of projectile :


    y = x tanθ -
    gx3
    2u2cos2θ


    u2sin2θ
    		 = 4×
    u2sin2θ
    g2g

    2sinθcosθ = 2sin2θ
    tanθ = 1
    θ = 45°

    Correct Option: B

    Equation of projectile :


    y = x tanθ -
    gx3
    2u2cos2θ


    u2sin2θ
    		 = 4×
    u2sin2θ
    g2g

    2sinθcosθ = 2sin2θ
    tanθ = 1
    θ = 45°

  1. An object covers distance which is directly proportional to the square of the time. Its accelaration is








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    When an object covers distance which is directly proportional to the square of the time, its acceleration is constant. This is seen in the cases of falling objects. This connection between time and distance was first observed by Galileo.

    Correct Option: D

    When an object covers distance which is directly proportional to the square of the time, its acceleration is constant. This is seen in the cases of falling objects. This connection between time and distance was first observed by Galileo.