Question

1) During wave propagation, low and high regions are represented by __________ and __________ respectively on a graph.

a) Up arrow

b) Crest

c) Down arrow

d) Trough

2) Statement 1: Sound needs a medium for its propagation. Statement 2 : Sound cannot propagate through vacuum as vacuum does not have particles which can vibrate.

a) Only statement 1 is true

b) Only statement 2 is true

c) Both the statements are true

d) Both the statements are false

3) Which of the following statements are correct regarding waves?

a) Waves transfer matter from one place to another.

b) Waves transfer energy from one place to another.

c) Waves are disturbances that can propagate through a medium.

d) Waves are disturbance that can propagate through through vacuum.

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Answer 1

Answer:

BOTH ARE TRUE STATEMENTS ONLY

Answer 2

Answer: (1) Crest and Trough resoectively.

Explanation:

(2) Both statements are true.

therefore,

option (C) is correct.

(3) statements (b) and (c) are correct.