1.

What is the percentage change in the tension necessary in a somometer of fixed length to produce a note one octave lower (half of original frequency) than before?A. `25%`B. `50%`C. `67%`D. `75%`

Answer» Correct Answer - D
In Sonometer
`Vprop sqrt(T)`
`rArr T_(2)=(T_(1))/(4)`
`(T_(1)-T_(2))/(T_(1))xx100=(T_(1)-(T_(1))/(4))/(T_(1))xx100=75%`


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