Q.

For the wave shown in figure, the frequency and wavelength, if its speed is 320 msec−1, are

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a

8 cm, 400 Hz

b

80 cm, 40 Hz

c

8 cm, 4000 Hz

d

40 cm, 8000 Hz

answer is C.

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Detailed Solution

5λ2=20cm,λ=8cm=8×10−2 mf=vλ=3208×10−2=4000Hz
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