Find the time period of a wave whose frequency is 400 MHz?
0.0012 s
0.0025 s
0.0015 s
0.0010 s
Sound propagates through
Solid
Liquid
Gas
All the above
A stone is dropped into a well,44.1 metres deep.The sound of the splash is heard 3.13 seconds after the stone is dropped.Find the velocity of sound in air.
339.2 m/s
350 m/s
258.3 m/s
450 m/s
A man claps his hands near a mountain and hears the echo after 4 seconds.If the speed of sound under these conditions be 330 m/s,calculate the distance of the mountain from the man.
660 metres
600 metres
750 metres
570 metres
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 propogation of this disturbance a longitudinal or a transverse wave?
Longitudinal
Transverse
Stationary
Both longitudinal and transvers
Delhi Radio Station transmits musical programmes at 219 m wavelength and 1300 Hz frequency.Calculate the velocity of radio waves.
2.847 x 10-5
3.148 x 105
2.847 x 105
3.84 x 10-5
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
In SONAR we use
ultrasonic waves
infrasonic waves
radio waves
audible sound waves
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
The velocity of sound in vacuum is
332 m/s
330 m/s
288 m/s
0
