CBSE Class 8 sound — practice questions
24 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice CBSE Class 8 sound in the app →Sound is produced by:The SI unit of frequency is:In humans, the sound is produced by:Sound CANNOT travel through:The loudness of sound is measured in:The range of frequencies AUDIBLE to a normal human ear is approximately:The membrane that vibrates inside the ear and passes sound to the inner ear is called the:The to-and-fro motion of an object is also called:An object oscillates 100 times in 4 seconds. Its frequency is:Loudness of a sound depends mostly on the:Pitch (whether a sound is shrill or deep) depends mostly on the:Whose voice typically has the HIGHEST frequency?Why is sound heard fainter as air is pumped out of a bell jar containing a ringing bell?The figure shows a hand-built 'eardrum model' — a tin can with a rubber sheet stretched across one end, with cSounds of frequency HIGHER than 20,000 Hz are called:Bats and dogs can hear sounds well beyond what humans can. Police use a special whistle that dogs respond to bSound travels through a solid (like a wooden ruler) MORE easily than through air mainly because:If the amplitude of a vibration doubles, the loudness of the sound produced:Two bells A and B are struck. A has the SAME loudness as B but a HIGHER pitch. Which statement is correct?Sound from a small bell is heard inside a swimming pool when the bell is rung underwater. This happens becauseVocal cord length is about 20 mm in men, 15 mm in women, and much shorter in young children. The direct implicDoctors and engineers use 'ultrasound' to look inside bodies and check welds in metal pipes. Which property maWhich of the following is NOT an effective way of reducing noise pollution in a city neighbourhood?Why does a damaged eardrum lead to hearing impairment?