Physics MCQs with Answers

This is Physics MCQs section with detailed explanations for preparation of screening tests, interviews for government jobs. In this section candidate will learn MCQs on variety of topics from the subject.

1. 71 When the source of sound moves away form a stationary listener then ______________ occurs
   

   1. an apparent increase in frequency

   2. an apparent decrease in frequency

   3. an apparent decrease in wavelength

   4. no apparent change in frequency

   See Answer

   Added By: Ak Aamir

   Answer

   : an apparent decrease in frequency

   Explanation

   :
   N/A

2. 72 Which one is the correct relation for fundamental frequency of open and closed pipe
   

   1. fopen = 2 fclosed

   2. fclosed = 2fopen

   3. fopen = fclosed

   4. fopen = 1 / f closed

   See Answer

   Added By: Ak Aamir

   Answer

   : fopen = 2 fclosed

   Explanation

   :
   N/A

3. 73 Newton estimated the speed of sound _____________________
   

   1. 281m/sec

   2. 333m/sec

   3. 340m/sec

   4. all of the above

   See Answer

   Added By: Ak Aamir

   Answer

   : 281m/sec

   Explanation

   :
   N/A

4. 74 The speed of sound in hydrogen is _____________ time than that in oxygen
   

   1. Two times

   2. Three times

   3. Four time

   4. Six time

   See Answer

   Added By: Ak Aamir

   Answer

   : Four time

   Explanation

   :
   N/A

5. 75 The speed of stationary waves in a stretched string are independent of___________________
   

   1. Number of loops

   2. Tension in the string

   3. Point where string is plucked

   4. both A and C

   See Answer

   Added By: Ak Aamir

   Answer

   : both A and C

   Explanation

   :
   N/A

6. 76 Which phenomena can be applied to estimate the velocity of star with respect to earth ___________________
   

   1. Dopplers effect

   2. Interference of waves

   3. Beats phenomena

   4. All of these

   See Answer

   Added By: Ak Aamir

   Answer

   : Dopplers effect

   Explanation

   :
   N/A

7. 77 The waves that require a material medium for their propagation are called__________________
   

   1. matter waves

   2. electromagnetic waves

   3. carrier waves

   4. mechanical waves

   See Answer

   Added By: Ak Aamir

   Answer

   : mechanical waves

   Explanation

   :
   N/A

8. 78 When two identical traveling waves are superimposed, the velocity of the resultant wave__________________
   

   1. decreases

   2. increases

   3. remains unchanged

   4. becomes zero

   See Answer

   Added By: Ak Aamir

   Answer

   : remains unchanged

   Explanation

   :
   N/A

9. 79 If stretching force T of wire increases, then its frequency __________________
   

   1. decreases

   2. increases

   3. remains the same

   4. any of above

   See Answer

   Added By: Ak Aamir

   Answer

   : increases

   Explanation

   :
   N/A

10. 80 It is possible to distinguish between transverse and longitudinal waves form the property of __________________
    

    1. refraction

    2. polarization

    3. interference

    4. diffraction

    See Answer

    Added By: Ak Aamir

    Answer

    : polarization

    Explanation

    :
    N/A