Two successive antinodes are separated by a distance equal to
λ/4
λ/2
λ/6
λ
A wave source produces 20 crests and 20 troughs in 0.2 seconds. Find the frequency of the wave.
200 Hz
500 Hz
100 Hz
300 Hz
Find the time period of a wave whose frequency is 400 MHz?
0.0012 s
0.0025 s
0.0015 s
0.0010 s
A sound wave has a frequency of 1000 Hz and a wave length of 34 cm.How long will it take to travel 1 km ?
3.20 s
2.94 s
5.94 s
3.10 s
A sitar player plucks the wire of a sitar. After a short time each part of the wire starts vibrating in a direction perpendicular to the wire. Is the propagation of this disturbance a longitudinal or a transverse wave ?
Longitudinal
Transverse
Stationary
Both longitudinal and transverse
In progressive waves, distance between successive crests or troughs is
3λ/2
Longitudinal waves cannot travel through :
vacuum
solids
liquids
gases
The speed of the bob of an oscillating pendulum is zero :
at the mean position
at an extreme position
between the mean position and the left extreme
between the mean position and the right extreme
A simple pendulum has a metal bob which is negatively charged.If it is allowed to oscillate above a positively charged metallic plate then its time period will :
increase
decrease
remain the same
become zero
What kind of waves are used in SONAR ?
ultrasonic waves
infrasonic waves
radio waves
audible sound waves
