A sonometer wire of length 100cm under a tensio... - JAMB Physics 1990 Question
A sonometer wire of length 100cm under a tension of 10N, has a frequency of 250Hz. Keeping the length of the wire constant, the tension is adjusted to produce a new frequency of 350Hz. The new tension is
A
5.1N
B
7.1N
C
14.0N
D
19.6N
correct option: d
(\frac{F_1}{F_2}) = (\sqrt\frac{T_1}{T_2})
(\frac{250}{350}) = (\sqrt\frac{10}{T_2})
T2 = 19.6N
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