General Science - Physics

Welcome to General Science – Physics MCQ series of GKToday. As of today February 26, 2020, this series has 590 Questions. You may purchase a PDF E-Book compilation comprising all these questions and their answers with explanation from this link.

61. What part of the electromagnetic spectrum is detected by the human eye?
[A] Between 400 nm and 700 nm
[B] Between 40 nm and 70 nm
[C] Between 400 nm and 7000 nm
[D] Between 4 nm and 700 nm

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62. What is the difference of two close frequencies of superimposing waves known as?
[A] Transverse frequency
[B] Beat frequency
[C] Normal frequency
[D] Angular frequency

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63. Which of the following represents the total momentum transferred to a surface by an electromagnetic wave?
[A] Total energy transferred/Speed of light
[B] Total energy transferred/ 2 x Speed of light
[C] 2 x Total energy transferred/Speed of light
[D] None of the above

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64. Which of the following waves is absorbed by the ozone layer present in the atmosphere?
[A] Gamma
[B] Visible
[C] Radio
[D] Ultra violet

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65. In which of the following the sound cannot travel?
[A] Solids
[B] Liquids
[C] Gases
[D] Vacuum

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66. What is the relationship between the frequency and the pitch of a sound wave?
[A] Higher the frequency, higher the pitch
[B] Lower the frequency, higher the pitch
[C] Pitch is not dependant on the frequency
[D] None of the above

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67. What is the effect of increase of temperature on the speed of sound?
[A] it increases
[B] it decreases
[C] it may or may not increase
[D] No effect

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68. Which of the following are generally used to reduce reverberation in an auditorium as sound absorbents?
[A] compressed fibreboard
[B] rough plaster
[C] draperies
[D] All of the above

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69. What are infrasonic sounds?
[A] Sounds of frequencies below 20 Hz
[B] Sounds of frequencies above 20 Hz
[C] Sounds of frequencies below 200 Hz
[D] Sounds of frequencies above 20 Hz

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70. Which of the following is the cause of echo?
[A] When sound is absorbed
[B] When sound is transmitted
[C] When sound is reflected
[D] When sound is refracted

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