Fied [4]
Supp Q. No. 11 2069 Supp Set B Q. No. 11 A pianofon
wire having a diameter of 0.90 mm is replaced by another
wire of the same material but with diameter 0.93 mm. If the
tension of the wire is as before, what is percentage change
in the frequency of fundamental note?
14
and
end
Ans: 3.2
ibe
ed
+1]
in
су
4]
не
4]
56. 2072 Supp Q. No. 11 On a day when the speed of sound is
345 m/s, the fundamental frequency of a closed organ pipe
220 Hz. The second overtone of this pipe has the same
wave length as the third harmonic of an open pipe. How long
is the open pipe?
Ans: 0.47 m
57 2072 Set C Q. No. 11 A wire with mass 40 g is stretched so
that its ends are tied down at points 80 cm apart. The wire
vibrates in its fundamental mode with frequency 60 Hz
Calculate the speed of propagation of transverse waves in
the wire and the tension in the wire.
y у​