In open organ pipe___________________?
(A) only even harmonics are present
(B) only odd harmonics are present
(C) both even and odd harmonics are present
(D) selected harmonics are present
A simple pendulum has a bob of mass m and its frequency is f. If we replaced the bob with a heavier one say of 2m then that will be its new frequency ?
(A) 1/4f
(B) 1/2f
(C) frequency lower than 20 Hz
(D) 2f
Doppler effect applies to____________________?
(A) sound wave only
(B) light wave only
(C) both sound and light waves
(D) neither sound nor light wave
Beats are the results of____________________?
(A) diffraction of sound waves
(B) constructive and destructive interference
(C) polarization
(D) destructive interference
The periodic alternation of sound between maximum and minimum loudness are called___________________?
(A) silence zone
(B) interference
(C) beats
(D) resonance
The velocity of sound in air would become double than its velocity at 0°C at temperature________________?
(A) 313°C
(B) 586°C
(C) 819°C
(D) 1172°C
The normal ear is the most sensitive in the frequency range___________________?
(A) 20000 to 30000 hertz
(B) 10 to 20 hertz
(C) 2000 to 4000 hertz
(D) 6000 to 8000 hertz
On loading the prong of a tuning form with wax its frequency____________________?
(A) increases
(B) decreases
(C) remains unchanged
(D) may increase or decrease
Increase in velocity of sound in the air for 1°C rise in temperature is_________________?
(A) 1.61 ms-1
(B) 61.0 ms-1
(C) 0.61 ms-1
(D) 2.00 ms-1
Sound waves do not travel in vacuum because ___________________?
(A) they are transverse waves
(B) they are stationary waves
(C) they require material medium for propagation
(D) they do not have enough energy