Question 1 Define the term reverberation? Question 2 What is a megaphone.Name the principle on which a megaphone work? Question 3 What is a stethoscope.Name the principle on which a stethoscope work? Question 4 What is a soundboard.Name the principle on which a soundboard work? Question 5 Why are the ceiling of concert halls made curved? Question 6 How can we … [Read more...] about Reverberation
Sound
Reflection of sound
Question 1 What is meant by reflection of sound? Question 2 What type of surfaces are best for reflecting sound? Question 3 State the laws of reflection? Question 4 Define the term echo? Question 5 Why an echo is heard sooner on a hot day? Reflection of Sound Sound can also be made to change its direction and bounce back when it falls on a hard surface. The … [Read more...] about Reflection of sound
Human ear
Question 1 Name that part of ear which vibrates when outside sound falls on it? Question 2 Name the tiny bones present in middle part of ear? Question 3 What is the function of tiny bones in the middle ear? Question 4 Name the tube which connects the middle ear to throat? Question 5 Explain the working of ear? Question 6 Name the nerve which carries electrical … [Read more...] about Human ear
Sound
Question 1 Define sound? Question 2 What type of wave are sound wave in air? Question 3 Name two types of sound waves which are generated in a long spring? Question 4 What are mechanical waves? Question 5 Explain the term compression? Question 6 Explain the term rarefaction? Sound Sound is a form of energy .It is that form of energy which makes us hear. … [Read more...] about Sound
sonar
Question 1 Write the full form of SONAR? Question 2 What is a SONAR? Question 3 What is the use of sonar? Question 4 A sonar picks up a return signal after 3 sec.How far away is the object? Question 5 What is eco-ranging? Question 6 What is echolocation? Question 7 How is the bat able to fly at night without colliding with objects? Question 17 Explain how … [Read more...] about sonar
speed of sound in different medium
Question 1 Is the speed of sound more in water or steel? Question 2 In which medium sound travels faster:air or iron? Question 3 What name is given to those aircrafts which fly at speeds greater than the speed of sound? Question 4 What is meant by supersonic speed? Question 5 On what factors does speed of sound depends? Question 6 Define sonic boom? Question 7 … [Read more...] about speed of sound in different medium
characteristics of waves
Question 1 What is the frequency of sound wave whose time period is 0.07sec? Question 2 Define the term frequency? Question 3 Define the term wavelength? Question 4 Define the term wavelength? Question 5 Define the term amplitude? Question 6 What is the S.I. unit of frequency? Question 7 The wave travels in a coiled spring at a rate of 4m/s.The distance … [Read more...] about characteristics of waves
transverse wave
Question 1 What are transverse waves? Question 2 What is crest? Question 3 What is trough? Question 4 Give examples of transverse waves? Transverse Waves A wave in which the particles of medium vibrate up and down at right angle to direction in which wave is moving is called transverse wave. Transverse wave can be produced only in solid and liquids but not in … [Read more...] about transverse wave
Longitudinal Waves
Question 1 What is a longitudinal wave? Question 2 What type of wave are illustrated by the movement of rope whose one end is fixed to a pole and the other end is moved up and down? Question 3 Write the characteristics of longitudinal wave graph? longitudinal Waves The waves which travel along a spring when it is pushed and pulled at one end are longitudinal … [Read more...] about Longitudinal Waves