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MHT CET 2026 (15 Apr, Shift 1) · Speed of Waves

Speed of Waves question from MHT CET 2026 (15 Apr, Shift 1)

Q2MHT CET 2026 · 15 APR · SHIFT 1Easy

Speed of Waves

A wire is under tension of $2$ kg wt and a wave is travelling through it with some speed. Tension in the wire is so increased that the wave travels through it with thrice the original speed. The increase in tension is (in kg wt)

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Answer: (c)

$T \propto v^2$ , so tripling the speed makes $T' = 9T = 9 \times 2 = 18$ kg wt.
Increase $= 18 - 2 = 16$ kg wt.
So the answer is (c) $16$ .

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