CBSE PHYSICS: MCQ:Sound and Its Reflection

Chapter Sound and Reflection of sound

Objective: Multiple choice Questions

1. A sound wave travels from east to west, in which direction do the particles of air move?

(A) East – west (B) North - south

2. In which medium sound travels faster ?

(A) Solid (B) Liquid

3. What is the name of short duration wave?

(A) Pulse (B) Frequency

4. What is the velocity of sound in water at room temperature?

(A) 1500 m/s (B) 330 m/s

5. The unit of quantity on which pitch of the sound depends is :

(A) Hertz (B) metre

6. The unit of quantity on which loudness of found depends is :

(A) metre (B) Hertz

7. Nature of sound wave is :

(A) transverse (B) longitudinal

8. Pitch of high frequency sound is :

(A) high (B) low

9. Voice of a friend is recognized by its :

(A) Pitch (B) quality

10. Sound waves in air are :

(A) Longitudinal waves (B) Radio waves

Ans: . 1-A 2-A 3-A 4-A 5-A 6-A 7-B 8-A 9-B 10-A

Objective: Fill in the blanks

1. Pitch is the sensation of the ---------- of an emitted sound.

2. A high pitch sound is called a ------ sound

3. A low pitch sound is called a ----------- sound.

4. Loudness of sound wave is ditectly proportional to -------- amplitude

5. The sound energy transferred per unit area per unit time is called -------- of sound.

6. When a body moves with a speed which is greater than the speed of sound in air, it is said to be traveling at --------------

7. When wound waves traveling in air enter into the medium of water, ------- remains unchanged

8. Sound travels faster as the ------------ of the medium increases by 0.61 m/s with every 1degC 9. -----is an apparatus which is used to find the depth of a sea or to locate the under water things.

10. A sound wave of single frequency is called ---------

Ans:

1. Frequency

2. shrill

3. hoarse

4. Square

5. intensity

6. supersonic speed

7. Frequency

8. temperature

9. Sonar

10.Tone

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