14.Waves and Sound
medium

દોરી $7^{th}$ આવૃત્તિથી દોલન કરતી હોય,તો નિસ્પંદ અને પ્રસ્પંદ બિંદુની સંખ્યા કેટલી થાય?

A

$8, 7$

B

$7, 7$

C

$8, 9$

D

$9, 8$

Solution

(a) String will vibrate in $7$ loops so it will have $8$ nodes $7$ antinodes.

Number of harmonics = Number of loops = Number of antinodes

==> Number of antinodes $= 7$

Hence number of nodes = Number of antinodes $+ 1$

        $ = 7 + 1 = 8$

Standard 11
Physics

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