How is the pitch of sound in a guitar changed if (a) thin wire is used, (b) wire under less tension is used?

Answer in Brief

(a) Thin wire used - Higher pitch is obtained.
(b) Wire under less tension is used - a low pitch is obtained.

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Chapter 7: Sound - Short/Long Answer questions [Page 137]

Chapter 7 Sound
Short/Long Answer questions | Q 27 | Page 137

Loudness is determined by the __________ of vibration.

A pendulum oscillates 40 times in 4 seconds. Find its time period and frequency.

Name the phenomenon that causes a loud sound when the stem of a vibrating tuning fork is kept pressed on the surface of a table.

Decibel is the unit of pitch of a sound.

Smaller the membrane, .................. is the pitch.

A tuning fork produces sound of ................... frequency.

Match the following

column A	column B
(A) Amplitude	(1) frequency
(B) Frequency	(2) amplitude
(C) Loudness	(3)maximum displacement on either side
(D) Pitch	(4) presence of other frequencies
(E) Waveform	(5) 1/ time period

Obtain relationship between the time period and frequency.

What determines the pitch of a sound?

Name the factors which determine the pitch of a note.