51. The three main parts of the human ear are
Answer: B. outer ear, middle ear and inner ear
Physics Class 10 Unit 13: Sound MCQs
59 multiple choice questions with the correct answer for each. Tap an option to check yourself, or switch on "Show all answers". This is page 2 of 2.
Tap an option to check your answer.
52. The three tiny bones in the middle ear are called
Answer: C. ossicles
53. The sound entered in the ear is amplified by the
Answer: D. ossicles
54. In the cochlea, vibrations are converted into electrical signals by
Answer: C. hair cells
55. Electrical signals from the cochlea go to the brain through the
Answer: B. auditory nerve
56. Excessive use of earphones at high volume can lead to
Answer: A. noise-induced hearing loss
57. A physician counts 69 heartbeats in 1 minute. The frequency of the heartbeat is
Answer: C. 1.15 Hz
58. The wavelength of a 20 kHz sound wave at 343 m/s is
Answer: A. 0.01715 m
59. A sound wave in seawater has speed 1500 m/s and wavelength 45 cm. Its frequency is
Answer: B. 3333.3 Hz
About Physics Class 10 Unit 13 MCQs (Federal Board)
These 59 Physics MCQs cover Class 10 Unit 13: Sound of the Federal Board (FBISE) SSC-II (Class 10) syllabus. They are SLO-based MCQs as per the new pattern for FBISE exams. Each question has four options and the correct answer is shown, so you can practise for the annual examination and find the topics you still need to revise. The questions are split over 2 pages of 50. You can also read the Sound notes for this chapter. Download the Sound MCQs as a PDF using the button at the top of this page.