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Forced Oscillations & Resonance - 2 Video Lecture | Physics for JAMB

FAQs on Forced Oscillations & Resonance - 2 Video Lecture - Physics for JAMB

1. What is forced oscillation?

Ans. Forced oscillation refers to the motion or vibration of a system that is driven by an external force or input. It occurs when an oscillating system is subjected to a periodic force or disturbance that is not its natural frequency.

2. What is resonance in relation to forced oscillations?

Ans. Resonance occurs in forced oscillations when the frequency of the external force matches the natural frequency of the oscillating system. This leads to a significant increase in the amplitude of the oscillation, resulting in a phenomenon known as resonance.

3. How does resonance affect the amplitude of forced oscillations?

Ans. Resonance amplifies the amplitude of forced oscillations. When the driving frequency matches the natural frequency of the system, constructive interference occurs, causing the amplitude to increase significantly. The system absorbs and stores energy from the driving force, leading to larger vibrations.

4. What are some real-life examples of forced oscillations and resonance?

Ans. Some examples of forced oscillations and resonance in real-life include the swinging of a playground swing when pushed at the right frequency, the shattering of a glass by a singer hitting its resonant frequency, or the phenomenon of bridge swaying due to strong winds matching its natural frequency.

5. How can resonance be avoided or controlled in practical applications?

Ans. Resonance can be avoided or controlled in practical applications by adjusting the frequency of the external force to be different from the natural frequency of the system. This can be achieved by using damping techniques, altering the system's characteristics, or changing the driving frequency to avoid resonance and prevent unwanted amplification of oscillations.

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Jul 14, 2025 Last updated

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