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Chapter 8 - Waves - 3
1.
The change in the pitch of sound caused by relative motion of source and listener is called:-
a) None of these
b) Doppler's effect
c) Accoustics
d) Laplace's correction
2.
Waves transport energy without transporting ____________________
a) Matter
b) Organism
c) Water
d) Air
3.
The waves which propagate by the oscillation of material particles are called _________________ waves.
a) Mechanical
b) Electrical
c) High
d) Low
4.
The waves which do not need a material medium for their propagation are called _____________ waves
a) Elecrostatic
b) Electromagnetic
c) Static
d) Mobile
5.
An oscillating mass-spring system is an example of ________________ Vibrator.
a) Perpendicular
b) Periodic
c) Parallel
d) Serial
6.
In longitudinal wave, particles of the medium vibrate _________________ to direction of propagation.
a) Periodic
b) Parallel
c) Perpendicular
d) Verticle
7.
The velocity of sound in air increases by __________ms
-1
per degree rise in temp.
a) 0.61
b) 0.91
c) 0.81
d) 0.45
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