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NEET 1997 (AIPMT) · Stationary Waves & Vibrating Strings

Stationary Waves & Vibrating Strings question from NEET 1997 (AIPMT)

Q114NEET 1997 · AIPMTEasy

Stationary Waves & Vibrating Strings

Standing waves are produced in $10\text{ m}$ long stretched string. If the string vibrates in 5 segments and wave velocity is $20\text{ m/s}$ , the frequency is

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Answer: (a)

5 segments (loops): $L = 5\dfrac{\lambda}{2}$ .
$\lambda = \dfrac{2 \times 10}{5} = 4\text{ m}$ .
$f = \dfrac{v}{\lambda} = \dfrac{20}{4} = 5\text{ Hz}$ .
So the answer is (a) $5\text{ Hz}$ .

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