Question

A physical system undergoing forced
vibrations is known as
(a) Driven harmonic oscillator
(b) Vibration harmonic oscillator
(c) Frequency harmonic oscillator
(d) None of them
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Answer 1

Answer:

Forced vibrations occur if a system is continuously driven by an external agency. A simple example is a child's swing that is pushed on each downswing. Of special interest are systems undergoing SHM and driven by sinusoidal forcing.

Explanation:

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Answer 2

A driven harmonic oscillator is a physical system that undergoes forced vibrations. (Option a)

• In a harmonic oscillator, vibration occurs at a constant frequency and amplitude.
• It is constant because no force is being exerted on the system.
• In reality, such kind of a harmonic oscillator comes to a stop eventually due to the natural decrease in amplitude.
• So, for the oscillation to be continuous and non-stop, there is always a need for a driving force.
• Such kind of a harmonic oscillator that is driven by a continuous force externally is called the driven harmonic oscillator.
• The force will be a time-dependent one.