Options:
- A. diffraction of sound waves
- B. constructive and destructive interference
- C. polarization
- D. destructive interference
View Answer
B. constructive and destructive interference
Physics
Which one is the correct relation for fundamental frequency of open and closed pipe ?
Options:
- A. fopen = 2 fclosed
- B. fclosed = 2fopen
- C. fopen = fclosed
- D. fopen = 1 / f closed
View Answer
A. fopen = 2 fclosed
Doppler effect applies to____________________?
Options:
- A. sound wave only
- B. light wave only
- C. both sound and light waves
- D. neither sound nor light wave
View Answer
C. both sound and light waves
Newton estimated the speed of sound _____________________?
Options:
- A. 281m/sec
- B. 333m/sec
- C. 340m/sec
- D. all of the above
View Answer
A. 281m/sec
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 ?
Options:
- A. 1/4f
- B. 1/2f
- C. frequency lower than 20 Hz
- D. 2f
View Answer
C. frequency lower than 20 Hz
The speed of sound in hydrogen is _____________ time than that in oxygen?
Options:
- A. Two times
- B. Three times
- C. Four time
- D. Six time
View Answer
C. Four time
In open organ pipe___________________?
Options:
- 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
View Answer
C. both even and odd harmonics are present
The speed of stationary waves in a stretched string are independent of___________________?
Options:
- A. Number of loops
- B. Tension in the string
- C. Point where string is plucked
- D. both A and C
View Answer
D. both A and C
The dimension of elastic modulus is ___________________ ?
Options:
- A. ML-1T-2
- B. ML-2T-2
- C. MLT-2
- D. ML2T-2
View Answer
A. ML-1T-2
Which phenomena can be applied to estimate the velocity of star with respect to earth ___________________?
Options:
- A. Dopplers effect
- B. Interference of waves
- C. Beats phenomena
- D. All of these
View Answer
A. Dopplers effect