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Question

# Match the following physical quantities with their respective S.I. units.

A
metre
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B
hertz
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C
second
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D
metre per second
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Solution

## Wavelength is the distance between two consecutive crests and troughs. Its S.I. unit is metre (m). Frequency is the number of oscillations or vibrations per second. Its S.I. unit is hertz (Hz). The time taken to complete one oscillation is time period. Its S.I. unit is second (s). Wave speed is the speed at which the wave propagates through the medium. Its S.I. unit is metre per second (m s−1).

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