In Melde's experiment, it was found that the string vibrates in 5 loops. When 10gms are placed in a light pan. What weight must be placed to the pan to make it vibrates in 10 loops? Neglect the weight of the pan.
A
2.5gm
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B
5gm
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C
7.5gm
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D
12.5gm
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Solution
The correct option is A2.5gm When a string of linear density 'm', under tension 'T', vibrates in 'n' loops, the frequency, n2l√Tm=N