SATHEE: Waves - Result Question 24

Waves - Result Question 24

24. The speed of a wave in a medium is $760 m / s$ . If 3600 waves are passing through a point in the medium in $2 m i n$ , then their wavelength is

[1995]

(a) $13.8 m$

(b) $25.3 m$

(d) $57.2 m$

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Answer:

Correct Answer: 24. (b)

Solution:

(b) Speed of the wave $(v) = 760 m / s$ ;

Number of waves $= 3600$

and time taken $(t) = 2 m i n = 120 s e c$ .

Frequecny of waves

(n) $= \frac{3600}{120} = 30 / s e c$ .

$∴$ wavelength of waves $(λ) = \frac{v}{n} = \frac{760}{30} = 25.3 m$

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Waves - Result Question 24

24. The speed of a wave in a medium is 760m/s. If 3600 waves are passing through a point in the medium in 2min, then their wavelength is

Answer:

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24. The speed of a wave in a medium is $760 m / s$ . If 3600 waves are passing through a point in the medium in $2 m i n$ , then their wavelength is