Question

Exercise
A. Tick (✓) the right answer in the following multiple choice questions.
1. What is the time required to define frequency?
i) 1 sec. ii) 2 sec. iii) 3 sec. iv) 4 sec.

2. What is the frequency of audible sounds?
i)2Hz to 20 Hz
ii) 20 Hz to 20 KHz
iii) 20 Hz to 200 KHz
iv) 20 Hz to 200 Hz
3. What is the minimum distance of a reflecting surface from the
source of sound to produce echo?
i) 10 m
ii) 20 m iii) 17 m iv) 27 m.
4. What happens to the pitch of sound when frequency is increased?
i) Increases ii) Decreases iii) No change
iv) Sometimes increases and sometimes decreases
5. What happens to the loudness of the sound when its amplitude is
higher?
i) High
ii) Low iii) No difference iv) High or low.
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Answer 1

Answer:

1. Ans 1 sec

2.Ans 2Hz to 20Hz

3.Ans 10 m

4.Ans Decreases

5.High

Answer 2

Answer:

1) What is the time required to define frequency?

answer : 2 sec.

2) What is the frequency of audible sounds?

answer : 20 to 20,000HZ

3) What is the minimum distance of a reflecting surface from the

source of sound to produce echo?

answer : 17m

4) What happens to the pitch of sound when frequency is increased?

answer : increases

5) What happens to the loudness of the sound when its amplitude is

answer : high