Advertisements
Advertisements
Question
Distinguish between forced vibrations and resonance.
Solution
| Sr. No. |
Forced vibrations | Resonance |
| 1. | It is produced by an external periodic force of any frequency. | It is produced by an external periodic force whose frequency is equal to the natural frequency of the body |
| 2. | The frequency of vibrations is different from the natural frequency of the body |
The frequency of vibrations is the same as the natural frequency of the body. |
| 3. | The amplitude of vibration is small. | The amplitude of vibration is very large. |
| 4. | Vibrations stop as soon as the external force is removed. | Vibrations continue for some time even after the external force is removed |
| 5. | A faint sound is produced. | A loud sound is produced. |
Mode of vibration of a stretched string in the second harmonic:
Mode of vibration of a stretched string in third harmonic:
APPEARS IN
RELATED QUESTIONS
What are the forced vibrations and resonance?
Differentiate between free and forced vibrations.
A sonometer wire vibrates with three nodes and two antinodes, the corresponding mode of vibration is ...................
a) First overtone
b) Second overtone
c) Third overtane
d) Fourth overtone
Show that only odd harmonics are present in an air column vibrating in a pipe closed at one end.
A stretched wire emits a fundamental note of frequency 256 Hz. Keeping the stretching force constant and reducing the length of wire by 10 cm, the frequency becomes 320 Hz. Calculate the original length of wire.
State law of length.
What are forced vibrations?
Show that even as well as odd harmonics are present as an overtone in modes of vibration of the string.
A stretched wire 60 cm long is vibrating with its fundamental frequency of 256 Hz. If the length of the wire is decreased to 15 cm and the tension remains the same. Then the fundamental freuqency of the vibration of the wire will be ______.
