Physics
Write true or false for each statement:
(a) Sound can travel in vacuum.
(b) Sound is a form of energy.
(c) Sound can only be produced by vibrating bodies.
(d) Larger is the amplitude, feeble is the sound.
(e) The frequency is measured in hertz.
(f) Loudness depends on frequency.
(g) Waveforms of two different stringed instruments can be the same.
(h) Female voice is shriller than the male voice.
(i) A ticking clock sound is heard late when heard through a metal.
Answer
(a) False
Correct Statement — Sound cannot travel in vacuum. Sound needs a medium for its propagation.
(b) True
(c) True
(d) False
Correct Statement — Larger is the amplitude, louder is the sound produced.
(e) True
(f) False
Correct Statement — Loudness depends on amplitude.
(g) False
Correct Statement — Waveforms of two different stringed instruments are different.
(h) True
(i) False
Correct Statement — A ticking clock sound is heard faster when heard through a metal.
Related Questions
Fill in the blanks:
(a) Sound is produced when a body …………… .
(b) The number of times a body vibrates in one second is called its …………… .
(c) The pitch of a sound depends on its …………… .
(d) Sound can travel in …………… .
(e) We can hear sounds of frequency in the range of …………… .
(f) Sound requires a …………… for propagation.
(g) Sound travels faster in …………… than in liquids.
(h) The sound heard after reflection is …………… .
(i) …………… produces sensation in ears.
Match the following:
Column A Column B (a) Vibrations cause (i) absorb sound (b) A shriller sound is (ii) second (c) Unit of frequency (iii) sound (d) Unit of time period (iv) of high pitch (e) Curtains (v) hertz We can distinguish a shrill sound from a flat sound by its:
- amplitude
- loudness
- pitch
- none of the above
We can hear sound of frequency:
- 10 Hz
- 500 Hz
- 100,000 Hz
- 50,000 Hz