Which one does not work according to resonance ?
Correct answer: D. Bulb
- A. T.V
- B. Radio
- C. Microwave oven
- D. Bulb
Explanation
Television and radio tuning use resonance to select a desired frequency, and microwave ovens use resonant production and absorption of microwave energy. An ordinary bulb produces light by heating its filament and does not depend on resonance. A student may choose c because microwaves involve a frequency, but frequency alone does not mean the device operates by resonance.
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About Simple Harmonic Motion
Simple harmonic motion is oscillation in which acceleration is directly proportional to displacement and directed toward the equilibrium position. Work includes displacement, velocity, acceleration, phase, period, frequency, amplitude and energy, with applications to springs and simple pendulums. The restoring force and the conditions for SHM distinguish it from general periodic motion.
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