Page 16 - Final Science BB Prep2 Part one (2nd term) 2024-2025_Neat

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Science Prep.2

USING SAVART'S WHEEL TO DETERMINE THE PITCH OF A TONE:

: Using Savart's Wheel To Determine The Pitch Of A Frequency Of Unknown Tone.

ሺ ሻ ሺ ሻ ሺ ሻ
Frequency=
ሺ ሻ

Speed Of Rotation = No. Of Rotation / Time

Note

By increasing the Speed
of the rotation The sound
The frequenvy
or becomes High
Increases
the Number of the geer Pitched
teeth

Problems:

1- Calculate the frequency of a musical tone similar to the frequency of a tone produced by
Savart’s wheel rotates with velocity 960 cycles in 2 minutes if you know that the no. of

gear teeth is 30 teeth.

<<solution>>
Time (t)= 2 x 160 = 120sec.

ሺ ሻ ሺ ሻ ሺ ሻ
Frequency= = = 240 Hz
ሺ ሻ
2- Calculate the time in minutes taken by Savart’s wheel to make 600 cycles if the frequency
is 300 Hz and the no. of gear teeth is 60 teeth.

<<solution>>
ሺ ሻ ሺ ሻ ሺ ሻ .
Frequency= , 100 =
ሺ ሻ

No. of the gear teeth (n) = 100 x = 50 teeth.

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