Question

Two bodies A and B are made to vibrate in such a way that Body A vibrates 10 times in a second and Body B vibrates 120 times in 1 minute. A) Which body would produce a shriller sound and why? B) How is the pitch of sound related to its frequency? C) Write an activity to show effect of frequency on the pitch of sound​

Answer 1

Given:

Two bodies A and B are made to vibrate in such a way that Body A vibrates 10 times in a second and Body B vibrates 120 times in 1 minute.

To find:

• Which body produces shriller sound?

• How is pitch related to frequency?

• Activity to show this effect.

Solution:

Frequency of body A = 10/60 = 0.16 Hz

Frequency of body B = 120/60 = 2 Hz

Since , Body B has higher frequency, it will produce a shriller (high pitched) sound than Body A.

• Frequency is directly proportional to the pitch.

• Higher the pitch , higher will be frequency , higher will be the shrillness of the sound.

Experiment:

• Go to physics lab of your school.

• Take two tuning forks of different frequencies (e.g. 256 Hz and 512 Hz)

• Make the forks vibrate by hitting it on a cork plate.

• Bring the vibrating fork near your ear.

• You will be able to understand this effect of frequency and pitch.

• 512 Hz tuning fork will produce high pitched sound than 256 Hz fork.

$\star$ HOPE IT HELPS.

Answer 2

Answer:

18.Two bodies A and B are made to vibrate in such a way that body A vibrates 10 times in

one second and body B vibrates 120 times in 1 minute.

i. Which body produce a shriller sound and why