Class 8 Science Chapter 10 MCQ Question Answer of Sound NCERT Solution in Hindi. NCERT Class 8 Science Question Answer and Important Question Answer, Textual Question answer also Available for Various Board Students like HBSE, CBSE, UP board, Mp Board, RBSE and some other State Boards.
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NCERT Solution for Class 8 Science Chapter 10 Sound MCQ Question Answer.
Sound Class 8 MCQ Question Answer
1. The back and fro movement of an object is called?
(a) Motion
(b) Vibration
(c) Amplitude
(d) all the above
Answer
Ans. (b) Vibration
2. Voice box is also known as
(a) windpipe
(b) Vocal cord
(c) Larynx
(d) All the above
Answer
Ans. (c) Larynx
3. How much frequency humans can hear?
(a) 20hz to 2000hz
(b) 200hz to 20000khz
(c) 20hz to 20000hz
(d) 20khz to 20000khz
Answer
Ans. (c) 20hz to 20000hz
4. What is the loudness of normal breathing?
(a) 10db
(b) 20db
(c) 30db
(d) 40db
Answer
Ans. (a) 10db
5. Number of oscillations per second is called?
(a) Oscillatory motion
(b) Frequency
(c) Amplitude
(d) sound
Answer
Ans. (b) Frequency
6. What is the SI unit of frequency?
(a) Hertz
(b) Tesla
(c) Pascal
(d) Newton
Answer
Ans. (a) Hertz
7. If we increase the frequency of sound then what happens?
(a) Increases covering area
(b) decrease covering area
(c) No change
(d) None of the above
Answer
Ans. (b) decrease covering area
8. The sound that we enjoy is called?
(a) Noise
(b) Music
(c) both
(d) None
Answer
Ans. (b) Music
9. Sound can travel through
(a) gases only
(b) solids only
(c) liquids only
(d) solids, liquids and gases
Answer
Ans. (d) solids, liquids and gases
10. voice of which of the following is likely to have minimum frequency?
(a) Baby girl
(b) Baby boy
(c) A man
(d) A woman
Answer
Ans. (c) A man