Question
Download Solution PDFWhich of the following is an example of undamped oscillations?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFCONCEPT:
- Oscillation: Back and forth movement about a mean position in a regular rhythm is called oscillation.
- An undamped oscillation is a type of simple harmonic oscillation whose amplitude remains constant with time. Example: a bob of a simple pendulum displaced in a vacuum as there is no resistance to damp the amplitude.
- When the amplitude of oscillations of a simple harmonic system decreases with time, the oscillations are called damped simple harmonic oscillations. For instance, the oscillations of the bob of a simple pendulum in the air stretched guitar string and a child swinging on a swing with no additional external force.
EXPLANATION:
- In the oscillations of a bob or other SHM, air friction or other damp forces are present.
- So, the amplitude of oscillations decreases with time.
- In a vacuum, there is no air friction or damped force. So, there will no decrease in amplitude with time.
- Hence we can get undamped oscillations in a vacuum.
- So, The correct answer is option 2.
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