Oscillations and Waves - Department of Physics

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Questions and Answers

What does the quality factor (Q) measure in an oscillator?

  • Energy loss per cycle
  • Energy stored in the damped harmonic oscillator (correct)
  • Amplitude of the oscillatory motion
  • Damping of the oscillator

When does resonance occur in forced vibrations?

  • When the amplitude is small
  • When the driving force's period matches the natural frequency (correct)
  • When the damping is large
  • When the frequency is different from the natural frequency

What does the relaxation time measure in an oscillatory motion?

  • Time for damping to occur in the oscillator
  • Time for energy to reach maximum value
  • Time for frequency to reach maximum value
  • Time for amplitude to decay to 1/e of its initial value (correct)

What happens to resonance sharpness as damping increases?

<p>It becomes less sharp (C)</p> Signup and view all the answers

How is the quality factor (Q) calculated in a damped harmonic oscillator?

<p>$Q = \frac{w}{2r}$ (C)</p> Signup and view all the answers

What is the meaning of the term 'relaxation time' in the context of oscillatory motion?

<p>Time taken for energy to decay to 1/e of its initial value (C)</p> Signup and view all the answers

In forced oscillations, what can cause a resonant peak to be less sharp?

<p>Small damping (B)</p> Signup and view all the answers

'Quality factor' is also known by which other name?

<p>'Figure of merit' (B)</p> Signup and view all the answers

'Resonance' in forced vibrations occurs when which condition is met?

<p>'Driving force's period matches natural frequency' (B)</p> Signup and view all the answers

'Relaxation time' in an oscillatory motion measures the time required for what to happen?

<p>'Energy to decay to 1/e of its initial value' (A)</p> Signup and view all the answers

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