SAMPLE QUESTIONS
1. In an experiment with different tuning forks in different media, (data is recorded) as follows:
Medium | Frequency | Wavelength |
1 | 512 Hz | 0.6 m |
2 | 480 Hz | 1.0 m |
3 | 256 Hz | 2.5 m |
Density of the medium in decreasing order is:
a) 3, 2, 1
b) 2, 3, 1
c) 1, 2, 3
d) 3, 1, 2
2. Two waves produced by different sources are represented by:
y
_{1} = A sin 200 pi t
and y
_{2}= A sin 208 pi t where, y
_{1} and y
_{2} are displacements and (A) is the amplitude of the two waves.
The usual equation of a wave is given by:
y = A sin 2 pi ft.
If these two waves are sounded and heard simultaneously we would observe :
a) 8 beats in every second
b) 4 beats in every seconds
c) resonanace
d) destructive interference