Edexcel A-Level Physics Resonance Amplitude and Damping

Practise Edexcel A-Level Physics resonance amplitude and damping by explaining large oscillations, energy transfer and damper effects.

Exam points

explain large resonance amplitude when driving frequency matches natural frequency
link maximum energy transfer to resonance in loudspeakers, springs or bridges
describe how dampers reduce resonant swaying by dissipating oscillation energy

[Maximum number: 2]

A music system has a number of loudspeakers. One loudspeaker produces the low frequency sounds. This loudspeaker consists of a coil connected to a cone. The coil is in a region of magnetic field produced by a permanent magnet, as shown.

Figure for Question 5.5.152 - Resonance amplitude and damping question 1 — Edexcel A-Level Physics A2

At a particular frequency, the loudspeaker cone starts to oscillate with a very large amplitude.

Explain why this effect is observed.

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5.5.152 - Resonance amplitude and damping question 1