Length of a string tied to two rigid supports is $40 c m .$ Maximum length ( wavelength in $c m$ ) of a stationary wave produced on it is :

20

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80

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40

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120

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Solution

The correct option is C $80$
In fundamental mode of vibration wavelength is maximum
$\Rightarrow$ $l = \frac{λ}{2} = 40 c m$

$\Rightarrow λ = 80 c m$

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Length of a string tied to two rigid supports is 40cm. Maximum length ( wavelength in cm ) of a stationary wave produced on it is :

The correct option is C 80 In fundamental mode of vibration wavelength is maximum ⇒ l=λ2=40cm⇒λ=80cm

Length of a string tied to two rigid supports is $40 c m .$ Maximum length ( wavelength in $c m$ ) of a stationary wave produced on it is :

The correct option is C $80$
In fundamental mode of vibration wavelength is maximum
$\Rightarrow$ $l = \frac{λ}{2} = 40 c m$

$\Rightarrow λ = 80 c m$