GK Questions: General Science(Physics) – Set 1

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1. ………………. is also known as law of Galileo
   1.Newton’s Second Law
   2.Laws of motion
   3.Newton’s Third Law
   4.Newton’s First Law
   5.All of these
   

   Answer & Explanation

   Answer – 4. Newton’s First Law
   Explanation :
   First law –  Everybody retains its state or state of motion until an external force is applied on it
   
   
   
2. Which of the following is unit of Luminous intensity ?
   1.Mole
   2.Candela
   3.Kelvin
   4.Kilogram
   5.None of these
   

   Answer & Explanation

   Answer – 2.Candela
   Explanation :
   Luminous intensity is a measure of the wavelength-weighted power emitted by a light source in a particular direction per unit solid angle
   
   
   
3. According to the law of conservation of energy which of the following is true ?
   1.Energy can be created by many methods2.
   2.Enegy can’t be transformed into any other form
   3.Energy can’t be destroyed
   4.Energy can either be created or be destroyed
   5.Both 1 and 3
   

   Answer & Explanation

   Answer – 3.Energy can’t be destroyed
   Explanation :
   Law of conservation of energy : Energy can neither be created nor be destroyed but it can be transformed from one form to another form
   
   
   
4. The pressure exerted anywhere at a point of cofined fluid is transmitted equally and undiminished in all directions throughout the liquid is known as
   1.Pascal’s law
   2.Kepler’s law
   3.Newton’s law
   4.Stefan’s law
   5.None of these
   

   Answer & Explanation

   Answer – 1.Pascal’s law
   Explanation :
   Pascal’s law is also known as principle of transmission of fluid-pressure
   
   
   
5. The speed of the light is
   1.3×10⁶m/m
   2.8×10⁸m/s
   3.3×10⁸m/s
   4.6×10³m/m
   5.None of these
   

   Answer & Explanation

   Answer – 3. 3×10⁸m/s
   Explanation :
   Light is a transverse wave
   
   
   
6. Optical fibre following …………….. to carry the information in the form of light
   1.Law of scattering
   2.Refraction law
   3.Reflection law
   4.Total internal reflection
   5.None of these
   

   Answer & Explanation

   Answer – 4.Total internal reflection
   Explanation :
   Total internal reflection occurs when a propagating wave strikes a medium boundary at an angle larger than a particular critical angle with respect to the normal to the surface.
   
   
   
7. Twinkling of stars is based upon……………………………
   1.Reflection
   2.Refraction
   3.Scateering
   4.Both Reflection and Refraction
   5.None of these
   

   Answer & Explanation

   Answer – 2.Refraction
   Explanation :
   Refraction is the bending of a wave when it enters a medium where its speed is different
   
   
   
8. Which of the following denotes Ohm’s law ?
   1.I = VR
   2.R/I = V
   3.V = IR
   4.R = VI
   5.None of these
   

   Answer & Explanation

   Answer – 3.V = IR
   Explanation :
   Current is flowing through the conductor is direct proportional to the potential difference across its 2 ends.
   
   
   
9. The process of splitting of a heavy molecules into 2 or more lighter molecules is known as
   1.Nuclear Fission
   2.Nuclear Fusion
   3.Nuclear Process
   4.Nuclear reaction
   5.None of these
   

   Answer & Explanation

   Answer – 1.Nuclear Fission
   Explanation :
   Fission – an atom splits into smaller parts, discovered by  by German Otto Hahn
   
   
   
10. Depth of the Ocean is measured by
    1.Fathometer
    2.Mariner’s Compass
    3.Radar
    4.Tachometer
    5.None of these
    

    Answer & Explanation

    Answer – 1.Fathometer
    Explanation :
    Fathometer uses sound waves to determine the depth of water.It unit is Fathom