Acoustics English Medium Free Online Test 1 Mark Questions with Answer Key 2020 - 2021

10th Standard

    Reg.No. :
  •  
  •  
  •  
  •  
  •  
  •  

Science

Time : 00:20:00 Hrs
Total Marks : 20

    Part A

    10 x 1 = 10
  1. Velocity of sound in a gaseous medium is 330 m s-1. If the pressure is increased by 4 times without causing a change in the temperature, the velocity of sound in the gas is

    (a)

    330 m s-1

    (b)

    660 m s-1

    (c)

    165 ms-1

    (d)

    990 ms-1

  2. If a sound wave travels with a frequency of 1.25 x 104 Hz 344 ms-1, the wavelength will be 

    (a)

    27.52 m

    (b)

    275.2 m

    (c)

    0.02752 m

    (d)

    2.752 m

  3. Velocity of sound in the atmosphere of a planet is 500 m s-1. The minimum distance between the sources of sound and the obstacle to hear the echo, should be

    (a)

    17 m

    (b)

    20 m

    (c)

    25 m

    (d)

    50 m

  4. The velocity of sound is affected by

    (a)

    temperature

    (b)

    density

    (c)

    pressure

    (d)

    all the above

  5. The region of a sound wave having low pressure is

    (a)

    interference

    (b)

    refraction

    (c)

    rarefaction

    (d)

    compression

  6. Distance between two consecutive compressions is

    (a)

    λ

    (b)

    λ/2

    (c)

    λ/4

    (d)

  7. The pitch of sound depends on

    (a)

    frequency

    (b)

    amplitude

    (c)

    both

    (d)

    none

  8. Which voice is likely to have minute frequency?

    (a)

    baby girl

    (b)

    boy

    (c)

    A man

    (d)

    A woman

  9. Sound propagates maximum in

    (a)

    gas

    (b)

    liquid

    (c)

    solid

    (d)

    all

  10. A source emits a frequency of 1 kHz is moving toward a rest listener with a speed of 0.9 V, where V is the speed of sound wave. The frequency heard by the listener is ________.

    (a)

    10 Hz

    (b)

    0.1 Hz

    (c)

    100 Hz

    (d)

    10 kHz

*****************************************

Reviews & Comments about 10th Standard Science Acoustics English Medium Free Online Test 1 Mark Questions with Answer Key 2020 - 2021

Write your Comment