Q no 16: The speed of given by Newton’s formula keeping in view that sound travel process is?
Adiabatic
Isochoric
Isobaric
None of these

Q no 17: By increasing pressure the speed of sound in air will?
Decrease
Increases
May be both
None of these

Q no 18: Sound waves having frequency less than 20Hz called?
Ultrasound
Infrasound
Audio able range
None of these

Q no 19:Which material have greater speed of sound?
Gases
Liquids
Solids
None of these

Q no 20: waves interferes with each other how many ways?
1
2
3
4

Q no 21: Observable beat frequency will be upto?
10 Hz
20Hz
2000Hz
25kHz

Q no 22: Energy at nodes will be in the form of?
P.E
K.E
Zero
Half K.E and Half P.E

Q no 23: Distance b/w node and antinode will be?
Lamda
Lamda/2
2lamda/3
None of these

Q no 24: Which of two situation will have same general formulae for wavelength and frequency of different modes of vibration in stationary waves?
Both ends open , one end open
One end open, string fixed at both ends
String fixed at both ends, both ends open pipe
None of these

Q no 25: If tension in string will be 2 time then how much speed of wave will increase?
2 times
√2 times
1.41 times
Both b and c

Q no 26: If both observer and source are moving away from each other then apparent frequency that observer will receive?
Will increase
Should be decrease
Remains same
None of these

Q no 27: speed of sound in H2 will be as compared to O2?
2 times greater than in O2
Will be 16 times greater than in O2
Will be 4 times greater in O2 than in H2
None of these

Q no 28: By increasing mass in mass spring system in and simple pendulum , the time period will?
Decrease, increas
Decrease,remains same
Increases,remains same
Remains same, decrease

Q no 29: A highly damped system will have?
A sharp resonance curve
Fairly flat resonance curve
Moderate curve

Q no 30: frequlency of second’s pendulum will be?
2 Hz
1 Hz
0.99 Hz
None of these