If an air column of length 5cm resonates...

If an air column of length 5cm resonates with a stretched string of length 40cm, then the length of the same air column which will resonates with 60cm of the same string at the same tension will be

100cm

75cm

50cm

48cm

Text Solution

Verified by Experts

The correct Answer is:

`nl_1 = nl'_1 " and " nl_2 = nl'_2`
`l_1/l_2 = (l'_1)/(l'_2) therefore l'_2 = (l'_1)/(l_1) = l_2 = (50xx60)/(40) = 75cm`

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