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PDF chapter test
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Subjects
Science CBSE
Class 9
Sound
Textbook based HOTS
30.
Multiple choice question XXX
Exercise condition:
2
m.
1
.
The number of compressions or rarefactions per unit time gives __________.
Frequency
Pitch
Time period
Amplitude
2
.
A simple instrument used to produce pure sound of fixed frequency is-
A tuning fork
Fire tongs
Simple pendulum
Metre scale
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