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Assertion : The flash of lightening is s...

Assertion : The flash of lightening is seen before the sound of thunder is heard .
Reason : Speed of sound is greater than speed of light .

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

Verified by Experts

The correct Answer is:
C
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AAKASH SERIES-WAVES-EXERCISE-IB (Assertion (A) & Reason (R) Type Questions)
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  2. (A): The velocity of sound changes as we go up in the atmosphere. (R...

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

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  6. Assertion : Sound would travel faster on a not summer day than on a co...

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  7. (A): The error in Newton's formula of velocity of sound in air was 16%...

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  8. Assertion : The basic of Laplace correction was that, exchange of heat...

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  9. (A): Under given conditions of pressure and temperature, sound travels...

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  10. Assertion: The speed of sound in solids is maximum though their densit...

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  11. Statement-1 : Sound travels faster in moist air Statement-2 : The de...

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  13. "The bells are made of metals and not of wood." Why?

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  14. Statement-1 : Infrasonic waves are generally produced by large vibrati...

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  15. (A): Speed of sound in a gas is independent of changes in pressure of ...

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  16. Assertion (A) : Radio waves can be polarised. Reason (R) : Sound wav...

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  17. Assertion: In adiabatic expansion, temperature of gas always decreases...

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  18. Sound waves in air cannot be polarized because

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  19. (A): A tuning fork is made of an alloy of steel, nickel and chromium. ...

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  20. (A): Two arms of a tuning fork vibrate in same phase. (R): Each arm ...

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