Question 3
Which of the following statements are correct?
(i) Sound is produced by vibrations.
(ii) Sound requires a medium for propagation.
(iii) Light and sound both require a medium for propagation.
(iv) Sound travels slower than light.

(a) i, ii and iv only
(b) i and ii only
(c) i, ii and iii only
(d) ii, iii and iv only

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Solution

The answer is (a).
The correct statements are;

Sound is produced by vibrations.
Sound requires a medium for propagation.
Sound travels slower than light.

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Similar questions

Q. Question 3
Which of the following statements are correct?
(i) Sound is produced by vibrations.
(ii) Sound requires a medium for propagation.
(iii) Light and sound both require a medium for propagation.
(iv) Sound travels slower than light.

(a) i, ii and iv only
(b) i and ii only
(c) i, ii and iii only
(d) ii, iii and iv only

Which of the following process / processes release heat ?
(i) condensation (ii) vaporisation (iii) freezing (iv) melting

(a) only (i) (b) only (iv) (c) (i) and (iii) (d) (ii) and (iv)

Q. Which of the following can sometimes be 'zero' for a moving body?

(i) average velocity
(a) only (i)

(ii) distance travelled
(b) (i) and (ii)

(iii) average speed
(c) (i) and (iv)

(iv) displacement
(d) only (iv)

Which among the following statements are true for unisexual flowers ?
(i) They possess both stamen and pistil
(ii) They possess either stamen or pistil
(iii) They exhibit cross-pollination
(iv) Unisexual flowers possessing only stamens cannot produce fruits

(a) (i) and (iv)
(b) (ii) (iii) and (iv)
(c) (ii) and (iii)
(d) (i), (iii) and (iv)

Question 3
Which of the following statements is/are correct?
(i) All green plants can prepare their own food.
(ii) Most animals are autotrophs.
(iii) Carbon dioxide is not required for photosynthesis.
(iv) Oxygen is liberated during photosynthesis.

Choose the correct answer from the options below:

(a) (i) and (iv)
(b) (ii) only
(c) (ii) and (iii)
(d)(i) and (ii)

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Standard VI Physics

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The answer is (a). The correct statements are; Sound is produced by vibrations. Sound requires a medium for propagation. Sound travels slower than light.

The answer is (a).
The correct statements are;

Sound is produced by vibrations.
Sound requires a medium for propagation.
Sound travels slower than light.