Question

5 Which of the following musical instruments uses air column to produce sound?
(A) Veena
(B) manjira(cymbals)
(C)Flute
(D) tabla

6) Which of the following is false for loudness of sound and amplitude of vibration?
(A) Louchess of sound depends on its amplitude of the vibration.
(B) Loudness of a sound is proportional to the square of the amplitude of the vibration producing the sound.
(C) When the amplitude of vibration is large, the sound produced is loud.
(D) If the amplitude of vibration is increased to 4 times of its initial value, then the loudness of sound becomes 6 times of its initial value.

7)Due to which of the following reasons Chromium plating is done on some objects used in everyday life?
(i) Chromium is cheaper.
(ii) Chromium has a shiny appearance. (iii) Chromium does not corrode.
(iv) Chromium resists scratches.

(A) (i), (ii), (iii)
(B) (ii), (ii), (iv)
(C) (1), (iii), (iv)
(D) (i), (ii), (iii), (iv) ​

Answer 1

Answer:

vee do eoe hrirb o3 3ie either 3 dbr j

Answer 2

Answer:

5) flute

Explanation:

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