Question 11 MarkThe sound waves produced by the bats are infrasonicAnswerFalse View full question & answer→
Question 31 MarkThe speed of sound is more than the speed of light.AnswerFalse View full question & answer→
Question 51 MarkPlantation along roadside can reduce noise pollution.AnswerTrue View full question & answer→
Question 81 MarkHigher the amplitude of vibration, lesser is the pitch.AnswerFalse View full question & answer→
Question 91 MarkIn human beings, the vibration of vocal cords produces sound.AnswerTrue View full question & answer→
Question 101 MarkThe pitch of the sound depends on the frequency of the wave.AnswerTrue View full question & answer→
Question 111 MarkNoise pollution may cause partial hearing impairment.Answer TrueView full question & answer→
Question 121 MarkUnwanted or unpleasant sound is termed as music.AnswerFalse; Unwanted or unpleasant sound is termed as noise. View full question & answer→
Question 131 MarkThe lower the frequency of vibration, the higher is the pitch.AnswerFalse; The lower the frequency of vibration, the lower is the pitch. View full question & answer→
Question 141 MarkFor human ears, the audible range is 20 Hz to 20000 Hz.AnswerTrue View full question & answer→
Question 151 MarkIf the amplitude of vibration is large, sound is feeble.AnswerFalse; Amplitude of vibration is directly proportional to the loudness of sound. View full question & answer→
Question 161 MarkThe number of oscillations per second of a vibrating object is called its time period.AnswerFalse, The number of oscillations per second of a vibrating object is called frequency. View full question & answer→