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  • A Wave of frequency . is sent along a string towards a fined end. When this wave trave

A Wave of frequency 250 \mathrm{~Hz}. is sent along a string towards a fined end. When this wave travels back after reflection a node is formed at a distance of 30 \mathrm{~cm} from the fined end of the string. The speed of the incident wave.

Option: 1

150 \mathrm{~m} / \mathrm{s}


Option: 2

100 \mathrm{~m} / \mathrm{s}


Option: 3

250 \mathrm{~m} / \mathrm{s}


Option: 4

160 \mathrm{~m} / \mathrm{s}


Answers (1)

best_answer

\begin{aligned} & f=250 \mathrm{mz} \\ & \lambda=30 \\ & \lambda=60 \mathrm{~cm} \\ & \lambda=0.6 \mathrm{~m} \\ & V=f \lambda \\ & V=250 \times 0.6 \\ & V=150 \mathrm{~m} / \mathrm{s} \end{aligned}

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Ritika Jonwal

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