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(A): Only longitudinal waves can propaga...

(A): Only longitudinal waves can propagate through a gas.
(R): Gases have only bulk modulus.

A

Both 'A' and 'R' are true and 'R' is the correct, explanation of 'A'.

B

Both 'A' and 'R' are true and 'R' is not the correct explanation of 'A'

C

A' is true and 'R' is false

D

Both 'A' and 'R' are false

Text Solution

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The correct Answer is:
A
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AAKASH SERIES-WAVES-EXERCISE-IB (Assertion (A) & Reason (R) Type Questions)
  1. (A): Solids can support both longitudinal and transverse waves but onl...

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  2. (A): The frequencies of incident, reflected and refracted waves of sou...

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  3. (A): Only longitudinal waves can propagate through a gas. (R): Gase...

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  4. (A): A medium must have elasticity to support wave motion. (R): Rest...

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  5. (A): Both transverse and longitudinal mechanical waves can travel thro...

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  6. (A): Mechanical transverse waves cannot be generated in a gaseous medi...

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  7. (A): In a progressive wave particle velocity and wave velocity are sam...

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  8. (A): Wave velocity and particle velocity for transverse wave are mutua...

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  9. (A): If in the presence of two independent audio signals, no beats are...

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  10. (A): When a wave goes from one medium to other, average power transmit...

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  11. (A): If two waves of same amplitude, produce a resultant wave of same ...

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  12. (A): On reflection from a rigid boundary (denser medium), there is a c...

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  13. (A) : The wave length of sound waves increa ses when they are refracte...

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  14. (A): In a progressive longitudinal wave, the amplitude of the wave wil...

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  15. (A): Two sound waves of frequencies 400 Hz and 200 Hz can propagate wi...

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  16. (A): Sound waves cannot propagate through vaccum but light waves can ...

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  17. (A): The velocity of sound changes as we go up in the atmosphere. (R...

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  18. (A): The flash of lightening is seen before the sound of thunder is he...

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  19. (A): A wind is different from the sound wave in air. (R): The wind i...

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  20. (A): The velocity of sound in hydrogen gas is more than the velocity o...

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