Physics Toughest Trivia Exam: Quiz!

50 Questions | Total Attempts: 36

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Physics Quizzes & Trivia

Questions and Answers
  • 1. 
     Rockets were first used as
    • A. 

      Ceremonial fireworks

    • B. 

      A form of transportation

    • C. 

      Instruments of war

    • D. 

      Hunting tools

  • 2. 
    Which one of the following is not one of the three distinct elements that work together to make satellite (SATCOM) possible?
    • A. 

      Payload segment

    • B. 

      Control segment

    • C. 

      Ground control

    • D. 

      Space segment

  • 3. 
    Which one of the following is not a function of the (SATCOM) control segment?
    • A. 

      Ground control

    • B. 

      Payload control

    • C. 

      Network control

    • D. 

      Spacecraft control

  • 4. 
    Which of the following is/are semiconductor(s)?
    • A. 

      Silicon

    • B. 

      Copper

    • C. 

      Iron

    • D. 

      Germanium

  • 5. 
    Which one of the following phenomena is called the photoelectric effect? 
    • A. 

      High energy electrons impinge on a metallic anode which then emits photons.

    • B. 

      A high energy photon emits photons as it is slowed down. 

    • C. 

      A metal absorbs quanta of light and then emits electrons.

    • D. 

      Two electrons are created from a quantum of light.

  • 6. 
    Which of the following statement about X-rays is/are correct? 
    • A. 

      X-rays do not consist of electrically charged particles.

    • B. 

      X-rays has the same frequency with radio waves.

    • C. 

      X-rays are not deflected in an electric or magnetic field.

    • D. 

      The wave length of X-rays is longer than that of light. 

  • 7. 
    The phenomenon of radioactivity was first discovered by:
    • A. 

      Marie Curie

    • B. 

      Sir J.J. Thompson

    • C. 

      Neils Bohr

    • D. 

      Henri Becquerel

  • 8. 
    Two radioactive elements P and Q have half-lives of 10 and 20 minutes respectively. If they started off with the same number of atoms,  what is the ratio of the number of remaining atoms of P to that of Q after 80 minutes?
    • A. 

      8:1

    • B. 

      1:16

    • C. 

      16:1

    • D. 

      1:8

  • 9. 
    Which of the following names is not associated with models of the atom?
    • A. 

      Isaac Newton

    • B. 

      Sir J.J. Thompson

    • C. 

      Neils Bohr

    • D. 

      Ernest Rutherford

  • 10. 
    What is the peak value of an A.C. voltage whose r.m.s value is 100V?
    • A. 

      140.00V

    • B. 

      50.00V

    • C. 

      70.70V

    • D. 

      141.42V

  • 11. 
    A transformer with 5500 turns in its primary is used between a 240V A.C. supply and a 120V kettle. Calculate the number of turns in the secondary.   
    • A. 

      460

    • B. 

      11000

    • C. 

      2750

    • D. 

      232

  • 12. 
    The dimension of power is  
    • A. 

      ML2T-3

    • B. 

      MLT-2

    • C. 

      ML2T-2

    • D. 

      ML-2T-3

  • 13. 
    Two points on a velocity-time graph have coordinates (5s, 10ms-1) and (20s, 20ms-1). Calculate the mean acceleration between the two points 
    • A. 

      2.00ms-2

    • B. 

      0.83ms-2  

    • C. 

      0.67ms-2

    • D. 

      1.50ms-2

  • 14. 
    An object is projected with a velocity of 100m/s from the ground level at an angle Ɵ to the vertical. If the total time of flight of the projectile is 10s, calculate Ɵ. (g = 10m/s2
    • A. 

      550

    • B. 

      450

    • C. 

      300

    • D. 

      600

  • 15. 
    An object of mass 5kg moves around a circle of radius 6m. If the period of the motion is πs, calculate the force towards the center.          
    • A. 

      75N

    • B. 

      100N

    • C. 

      120N

    • D. 

      50N

  • 16. 
    A force of 20N applied parallel to the surface of a horizontal table is just sufficient to make a block of mass 4kg move on the table. Calculate the coefficient of friction between the block and the table [g = 10m/s2]. 
    • A. 

      1.0

    • B. 

      0.5

    • C. 

      2.0

    • D. 

      20.0

  • 17. 
    A simple pendulum has a period of 17.0s. when the length is shortened by 1.5m, its period is 8.5s. Calculate the original length of the pendulum.
    • A. 

      2.0m

    • B. 

      3.0m

    • C. 

      4.0m

    • D. 

      6.5m

  • 18. 
    A constant force of magnitude F acts on an object of mass 0.04kg initially at rest at a point O. If the speed of the object when it has moved 50m from O is 500ms-1, what is the value of F? 
    • A. 

      100N

    • B. 

      10N

    • C. 

      1000N

    • D. 

      55N

  • 19. 
    A girl whose mass is 20kg climbs up 25 steps, each of height 15cm in 10 seconds. Calculate the power expended [g = 10m/s2
    • A. 

      7500W

    • B. 

      750W

    • C. 

      7.5W

    • D. 

      75W

  • 20. 
    Two objects of masses 80kg and 50kg are separated by a distance of 0.2m. If the gravitational constant is 6.6x10-11Nm2kg-2, calculate the gravitational attraction between them.                                           
    • A. 

      6.6 x 10-6N

    • B. 

      6.8 x 10-6N

    • C. 

      6.1 x 10-6N

    • D. 

      1.3 x 10-6N

  • 21. 
    A machine having a velocity ratio of 4 requires a weight of 20kg to overcome the weight of 60kg. The efficiency of the machine is              
    • A. 

      90%

    • B. 

      60%

    • C. 

      75%

    • D. 

      331/3%

  • 22. 
    An object is heated from 300C to 570C. What is the increase in its temperature on the Kelvin scale?                                                      
    • A. 

      27K

    • B. 

      100K

    • C. 

      18K

    • D. 

      300K

  • 23. 
    The distance between the fixed points of a centigrade thermometer is 20cm. what is the temperature when the mercury level is 4.5cm above the lower mark?                         
    • A. 

      100.00C

    • B. 

      22.50C

    • C. 

      29.00C

    • D. 

      90.00C

  • 24. 
    Metal rods of length 20m each are laid end to form a bridge at 250C. What gap will be provided between consecutive rails for the bridge to withstand 750C?                                [Linear expansivity of the material = 2.0 x10-5K-1
    • A. 

      0.20m

    • B. 

      0.02m

    • C. 

      0.25m

    • D. 

      0.22m

  • 25. 
    A tap supplies water at 250C while another supplies water at 750C. If a man wishes to bath with water at 400C, what is ration of the mass of hot water to that of cold water required?                         
    • A. 

      3:7

    • B. 

      1:3 

    • C. 

      3:1

    • D. 

      15:8