logo
bettani-series-logo
  • Home
  • Books
  • About Us
  • Contact Us
  • Test

General Science Class 6th MCQs=745

Contents

Investigating Sound                          


  • Sound is a form of energy.
  • Sound travels as longitudinal waves.
    Three things
  • Three things are necessary for hearing sound.
  • Sound producing body
  • a)    Medium for traveling of sound 
  • b)    Receiving device
  • Longitudinal waves comprise of compression and rarefaction.
  • Human can hear in frequency range between 20Hz to 20,000Hz.
  • Sound can travel through solids, liquids and gases.
  • Sound cannot pass through vacuum.
  • The speed of sound in air at 00C is 332 m/s.
  • If the temperature is increase, the speed of sound increases.
  • The speed of sound at 200C is 344m/s.
  • The speed of sound in water is 1525 m/s.
  • The speed of sound in iron is 5130 m/s.
  • Back and forth movement of an object is called vibration.

Sound cannot travel through………………. NTS PST 15/12/2019 (8:30)
a) Iron                         
b) Wood         
c) Water                      
d) Vacuum

Human ear has…………distinct pats.
a) Four                                    
b) Two            
c) One                         
d) Three

Sound propagates maximum in……………
a) Gas                         
b) Liquid         
c) Solid                       
d) All

Speed of sound ……..in air with increase is temperature. NTS PST –P-2----(date not confirm)
a) Increase                 
b) Decrease     
c) Remain same                      
d) Both b and c

Speed of sound in Iron is………..
a) 5130 m/s                 
b) 1530 m/s
c) 3150 m/s  
d) 1503 m/s

Contents Details