Forced Oscillations & Resonance - 1

# Forced Oscillations & Resonance - 1 Video Lecture | Physics for JAMB

## Physics for JAMB

261 videos|249 docs|232 tests

## FAQs on Forced Oscillations & Resonance - 1 Video Lecture - Physics for JAMB

 1. What are forced oscillations?
Ans. Forced oscillations refer to the vibrations or oscillations of a system that are caused by an external force or input. These external forces can be periodic or non-periodic and can significantly affect the behavior and characteristics of the oscillating system.
 2. What is resonance in the context of forced oscillations?
Ans. Resonance is a phenomenon that occurs when the frequency of the external force or input matches the natural frequency of the oscillating system. In such cases, the amplitude of the oscillations is significantly increased, leading to a resonant response. Resonance occurs due to the constructive interference between the external force and the system's natural vibrations.
 3. How does resonance affect the behavior of forced oscillations?
Ans. Resonance amplifies the amplitude of forced oscillations, causing the system to vibrate with a higher intensity. This can lead to various consequences, such as increased stress on the system's components, potential damage, or even failure if the amplitude becomes too large. Resonance can also cause a phase shift between the external force and the system's response.
 4. What are some real-life examples of forced oscillations and resonance?
Ans. Some examples of forced oscillations and resonance include: - Swinging on a playground swing, where the pushing force from a person matches the swing's natural frequency, resulting in higher swings. - Singing or playing a musical instrument and hitting the resonant frequency of a glass, causing it to shatter. - Bridge collapse due to resonance caused by marching soldiers matching the bridge's natural frequency. - Car suspension system getting damaged due to resonance caused by driving at a specific speed.
 5. How can resonance be controlled or mitigated?
Ans. Resonance can be controlled or mitigated by several methods, including: - Adding damping or energy dissipation mechanisms to the system to reduce the amplitude of oscillations at resonant frequencies. - Adjusting the stiffness or mass of the system to change its natural frequency and avoid resonance with external forces. - Using active control techniques, such as feedback control systems, to actively suppress resonance by applying counteracting forces or vibrations. - Designing structures or systems with inherent resistance to resonance by avoiding resonant frequencies in their operational ranges.

## Physics for JAMB

261 videos|249 docs|232 tests

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