Onle Liner Mcqs Of Physics


Here you will find the most frequent questions of Physics which are asked in competitive exams. Moreover, This is smart study series keeping in view the importance of time.

However you don’t have to look for the options. You have to just read the most frequent questions and the answer is provided in it. whereby you know the answer within short span of time.

However, this will save a lot of your time. Moreover, At the end of every question you will see abbreviations like FPSC, PPSC, SPSC, NTS, STS, PTS, and OTS. This means that this question has occured/repeated in these competitive exams.

These MCqs of competitive exam is the result of research, experience and hardwork. Thus we have developed the content for you from being complex to being simple.

Important One liner Mcqs Of Physics For Allied Exams of CSS, FPSC, PPSC, SPSC

  1. Gamma Rays are similar to X-Rays. (FPSC,NTS,STS)
  2. The penetration of x-rays through an object depends upon the object’s Density. X-rays are used to disintegrate bladder stones. (PPSC,SPSC)
  3. Rays which are a positively charged particle emitted by a radioactive element- Alpha rays (STS, PTS, OTS)
  4. Rays which have negative charge Beta Rays.(NTS,STS, OTS)
  5. Rays which are Higher energy rays emitted by radioactive elements are Gamma rays 
  6. The radiation that is used in magnetic resonance imaging (MRI) is in the infra-red range.
  7. Night vision is possible with the help of infrared Rays (PPSC,SPSC)
  8. Optical fibre system is telecommunication system and Optic fibres are mainly used for communication Whereas Optical fibres are the fine strands of Glass. Fibre optics cable carries data in the form of light. (FPSC, STS, PTS)
  9. Fuse wire is made of 63% tin and 37% lead. (PPSC,SPSC)
  10. Optical fibres work on the principle of total” reflection. (FPSC, SPSC)
  11. An ordinary mobile phone communicates by using Radio waves 
  12. For sending sound waves at large distance, waves are used Radio Waves
  13. A mobile phone sends and receives messages through Radio waves
  14. The carrier waves used for the radio transmission have the frequency up to 30 KHz.
  15. Nowadays, the international communication and transmission is being done through the waves – Radio waves
  16. Which waves are electromagnetic wave Radio Waves (SPSC,PPSC,FPSC)
  17. Electromagnetic waves do not require any medium. (STS, FPSC,NTS)
  18. What makes the radio transmission possible lonosphere (FPSC, SPSC, PPSC)
  19. In radar we use radio waves; whereas in sonar we use Ultrasonic (PPSC,SPSC) 
  20. The principle used in radar is the same as that of sonar
  21. The waves used for sending signals to the satellite from ground station are Micro Waves (FPSC, PPSC,SPSC )
  22. The main cause of Tsunami is tide waves (FPSC, PPSC)
  23. Ordinary light spreads in all directions. How many colours a spectrum has Seven. The Separation of ordinary light into its constituent colors is- Dispersion (FPSC)
  24. Heat transfers from the sun to the earth through Radiation. (FPSC,STS,NTS)
  25. The principle of wireless telegraphy discovered – Signor Marconi. Joseph Aspdin is the inventor of cement (FPSC, PPSC,SPSC STS,PTS)
  26. Graham Bell invented Telephone. Henry Becquerel discovered Radioactivity (FPSC,PPSC)
  27. Johan Gutenberg invented the printing press. Samuel Colt Alexander invented revolver (FPSC,STS)
  28. Fleming Discovered Penicillin. Karl invented Bicycle .Einstein Developed The theory of relativity 
  29. Pressure cooker works on the principle that the boiling point of a liquid increases with the increase of pressure.(PPSC,SPSC)
  30. Silver is the best conductor of electricity. The best conductor of electricity is silver.
  31. Non-conductor of electricity – Mica & Diamond (FPSC, SPSC, PPSC)
  32. Paper is an insulator. (FPSC, PPSC,SPSC STS,PTS)
  33. Of all the flying machines that man has made only Rockets are suitable for space flight. (NTS,STS, OTS)
  34. If we know the mass of an object and the force applied on it, it is possible to calculate acceleration of the object.
  35. The instrument used for measuring the velocity of wind is Anemometer.The instrument that measure wind speed is the Anemometer.
  36. Barometer is used for measuring the pressure.
  37. The instrument which measures very high temperature is Pyrometer.
  38. Hygrometer used to meaning the Humidity in air
  39. The instrument which is specially designed for recording earth quake wave we call it seismograph which measure earth quake waves on a Richter scale.
  40. Hydrometer instrument determines specific gravity of liquids.
  41. A chronometer measures “Time”.
  42. The function of the thermostate in a refrigerator is to maintain temperature.
  43. Visible light energy has the wave length range of 390-700 nm. (PPSC,SPSC)
  44. Colour which has shortest wavelength is Violet Whereas  color which has the longest wavelength is Red (PSPSC STS, SPSC)
  45. Infrared waves have more wavelengths than the red colour (PPSC,SPSC)
  46. The smallest unit of measurement of wave-length is Angstrom.
  47. In the eye only Retina contains receptors for light energy. Image of the object is formed on the Retina of the eye. Sensitive layer of the eye is Retina. (STS, FPSC,NTS)
  48. Light is visible Our eye is very sensitive to blue light. (PPSC,SPSC)
  49. When a person can see nearer objects but not the distant ones he is suffering from Myopia/Nearsightedness/Short sightedness. (FPSC, SPSC, PPSC)
  50. Myopia is a defect of human eye. It can be corrected by using a lens called concave lens (FPSC, PPSC,SPSC STS,PTS)
  51. Magnifying power of a simple microscope can be increased by decreasing focal length of the lens (FPSC, SPSC, PPSC)
  52. lens which is used as magnifying glass is Convex (FPSC, PPSC,SPSC STS,PTS)
  53. The rear view mirror of a motor vehicle is Convex and the mirror placed near the driver of a bus is Concave mirror. (STS, PTS, OTS)
  54. Convex lenses are used for the correction of Longsightedness (Hyperopia).(FPSC)
  55. Human eye fades away on image in 1/20 seconds. and to read book hold it about 25cm from eyes (FPSC, PPSC,SPSC STS,PTS)
  56. Standard pressure is 760mm-Hg. (FPSC,NTS,STS)
  57. The capacity to do work is – Energy. The energy possessed by body due to its position is potential energy. The energy possesses by water in a dam is potential energy (PPSC)
  58. Kitab-al-Manazar is publication by a famous Scientist about Optics. Ibn-al-Haisham wrote Kitabl- al-Manazar (FPSC, PPSC,SPSC STS,PTS)
  59. Abu Ali Sina, Al Beruni, ( Al Beruni died in 1048 A.D ) Ibn Al Haisham belonged to 10th
  60. Abdus Salam of Pakistan was one of the contributors of the unification of electromagnetic force and weak nuclear force. (FPSC,NTS,STS)
  61. In a heat engine heat energy is changed into Mechanical Energy. (FPSC, STS, PTS)
  62. Basic metals can be converted into gold by artificial unclear radioactivity. (STS, PTS)
  63. Electrochemical cell converts the chemical energy into electrical energy. (FPSC, SPSC )
  64. A device converts chemical energy into electrical – battery (FPSC, SPSC, PPSC)
  65. When a bullet penetrates, into a target the kinetic energy of a bullet is converted into Mechanical Energy. Mechanical energy is store in dry cell. (FPSC, SPSC, PPSC)
  66. Electricity is a secondary source of energy.Dynamo is a device that converts Mechanical energy into Electrical energy.  (PPSC,SPSC)
  67. Television signals are converted into light signals by transistor. (SPSC,PPSC,FPSC)
  68. In a colour television, the colours are green, red and blue.(PPSC,SPSC)
  69. All forms of energy that we use ultimately transform into Heat energy. (NTS,STS, OTS)
  70. Video camera is used to convert Picture into electrical signals (FPSC, PPSC,SPSC)
  71. For being able to see three-diemensional pictures we have to use An Epidiascope.
  72. Device  which used to measure nuclear radiation for safety purposes is Dosimete
  73. The unit of sound is Decibel.The approximate intensity level of the sound which can cause damage is 100 decideb (dB) (SPSC,PPSC,FPSC)
  74. Frequency of audible sound is 20-20,000Hz (FPSC, PPSC,SPSC STS,PTS)
  75. Bat has the highest upper limit of audible range. Bats can hear upto 120,000hz (PPSC)
  76. Man ear cannot distinguish two identical sounds that reach less than 415 sec (SPSC)
  77. The unit “TON” to specific air conditioners is equivalent to 12000 BTU/hr. (PPSC,SPSC)


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