NEET-XII-Physics
qstns with ansrs year:2022
- #29If the initial tension on a stretched string is doubled, then the ratio of the initial and final speeds of a transverse wave along the string is :
(A) `` 1: 2 ``
(B) `` 1: 1 ``
(C) `` \sqrt{2}: 1 ``
(D) `` 1: \sqrt{2} ``digAnsr: DAns : `` v \propto \sqrt{\text { Tension }} ``
`` \frac{ v _{ i }}{ v _{ f }}=\sqrt{\frac{ T _{ i }}{ T _{ f }}} ``
`` \frac{ v _{ i }}{ v _{ f }}=\sqrt{\frac{ T }{2 T }} ``
`` \frac{ v _{ i }}{ v _{ f }}=\sqrt{\frac{1}{2}}=\frac{1}{\sqrt{2}} ``