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WAEC Physics 2016 Paper

Question : 24

Total: 47

Solution:

Concept:

The distance between two successive troughs is the wavelength

\lambda

The wave speed is given by

v = f \lambda

Explanation:

Given:

\lambda = 0.4\ \mathrm{m}

and

f = 825\ \mathrm{Hz}

Substitute into the wave equation:

v = f \lambda = 825 \times 0.4

v = 330.0\ \mathrm{m\,s^{-1}}

Answer:

The speed of the wave is

330.0\ \mathrm{m\,s^{-1}}

Therefore, the correct option is B.

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