All of the following are considered as everyday examples of resonance EXCEPT
Correct answer: B. Shock absorbers of a car.
- A. A playground swing
- B. Shock absorbers of a car.
- C. Turning the knob of the radio set.
- D. A music system playing on a heavy beat.
Explanation
The correct answer is Option B: shock absorbers of a car. Shock absorbers are used to dampen or reduce the amplitude of vibrations, not to create or amplify them, which is opposite to the concept of resonance. Option A, a playground swing, resonates when pushed at its natural frequency. Option C, the radio set, involves resonance when tuning into a station as it matches the frequency. Option D, a music system playing on a heavy beat, can cause resonant vibrations in surrounding objects.
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About Superposition and Interference
Superposition states that overlapping waves produce a resultant displacement equal to the algebraic sum of their individual displacements. Interference covers constructive and destructive interference, phase difference, path difference, coherent sources, and conditions for maxima and minima. It differs from diffraction, which involves spreading around openings or obstacles.
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