# ICSE Worksheet for chapter-10 Sound class 10

#### Worksheet For class 10

This page is prepared by the Academic team of Physics Wallah which consists of ICSE Board Worksheet for Class 10 Physics. Students of Class 10 Physics can get a free Worksheet for Class 10 Physics in PDF format prepared as per the newest syllabus and examination pattern in your schools.

Standard 10 students can practice questions and answers which are given here for Physics in Grade 10 that will help them to improve their knowledge of all important chapters and their topics. Students can also download free pdf of Class 10 Physics Notes prepared by teachers and solve important problems provided here with solutions on daily basis to get more scores in school exams and tests.

If any students need to take the online test to check their concepts or undertstanding then they can visit Physics Quiz for Class 10.

## Summary

• FREE VIBRATIONS
• NATURE OF FREE VIBERATIONS
• DAMPED VIBRATIONS
• FORCED VIBRATIONS
• RESONANCE

### Section 1 - Objective

Q1. When a body vibrates with its natural frequency, the force acting on the body is:

1. Zero
2. Proportional to its velocity
3. Proportional to its displacement
4. A constant force

Q2. The damped vibrations are with:

1. Amplitude decreasing with time
2. Amplitude increasing with time
3. Constant amplitude
4. First decreasing amplitude and then increasing amplitude

Q3. A tuning fork of frequency 256 Hz will resonate with frequency:

1. 128Hz
2. 256Hz
3. 384Hz
4. 356 Hz

Q4. Speed of sound in air is 350ms-1. Fundamental frequency of an open organ pipe of 50cm length will be:

1. 175Hz
2. 350Hz
3. 700Hz
4. 500Hz

Q5. An open pipe of length 33cm resonates with frequency of 1000Hz. If the speed of sound is 330ms-1, then the frequency is:

1. The fundamental frequency of the pipe
2. The first harmonic of the pipe
3. The second harmonic of the pipe
4. The fourth harmonic of the pipe

Q6. The condition when frequency of the applied force is equal to the natural frequency of the vibrating body is

1. Velocity
2. Resonance
3. Impedance
4. NOT

Q7. As an empty vessel is filled with water, its fundamental frequency:

1. Increases
2. Decreases
3. Remains the same
4. None of these

Q8. Melodious sound is produced an in open ended organ pipe because:

1. Odd number of frequencies is generated
2. No any frequencies is generated
3. Even and odd number of frequencies are generated alternately
4. None of these

Q9. Beats are heard due to interference of two sound waves. The intensity of sound changes from maximum to minimum in 100ms. Therefore, the difference in frequencies of the two waves is:

1. 10Hz
2. 5Hz
3. 2.5Hz
4. 20Hz

Q10. Sound waves produced by a source are propagating in a medium. The quantity/quantities that change from point to point is / are

1. Pressure
2. Elasticity
3. Temperature
4. None of these

### Section 2 - Subjective

Q1. Distinguish between Free vibrations and Forced Vibrations

Q2. What do you mean by damped vibration? Draw the displacement time graph for damped and undamped vibrations.

Q3. A person is tuning his radio set to a particular station. What is the person trying to do to tune it.

• Name the phenomenon involved in tuning the radio set.

Q4 Define Resonance and write any 3 applications of resonance?

### Solutions for Section 1 & 2

Objective

 1. A 2. A 3. B 4. B 5. C 6. B 7. A 8. C 9. B 10. A

Subjective

Ans 3. (i) Frequency of Radio set = Frequency of Radio waves

(ii) Resonance