What name has been given to the wave of short duration?
pulse
periodic wave
elastic wave
none of these
Sound waves cannot pass through
a solid-liquid mixture
a liquid-gas mixture
an ideal gas
a perfect vacuum
If the time period of a wave increases, its frequency will
increase
decrease
remain the same
first increase then decrease
The height of the crests of a wave are called
amplitude
displacement
frequency
When we pluck the wire of a sitar, the waves produced in the wire are
longitudinal
transverse
sometimes longitudinal and sometimes transverse
electromagnetic
The echo will be heard if the original sound reflected by an obstacle reaches our ears after
10 s
5 s
1 s
0.1 s
In sonar, ultrasonic waves are sent into the sea water and the reflected waves from a sunken ship are received after 2.0 s. If the velocity of waves in sea water is 1450 ms-1. Find the depth of sunken ship.
1450 m
14.5 m
145 m
1.450 cm
The speed of electromagnetic waves in air is
3 x 105 km/s
3 x 106 km/s
3 x 107 km/s
3 x 108 km/s
The distance between a compression and the next rarefaction in a longitudinal wave is
λ
2λ
A wave completes 20 vibrations in 2.5 s, its frequency is
20 Hz
8 Hz
200 Hz
50 Hz
