Lesson 5.3.3
5.3.3 Damping Quiz: OCR Physics, Unit 4
20 questions
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Lesson 5.3.3, Damping: 20 multiple choice questions for the OCR Physics (H156), Unit 4: Newtonian world and astrophysics, written with Revision Ninja.
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The 20 questions
-
What frequency does a system oscillate at during free oscillations?
- Resonant frequency
- Zero frequency
- Driving frequency
- Natural frequency
-
What causes a system to undergo forced oscillations?
- Periodic external force
- Constant friction force
- Initial displacement only
- Gravitational pull only
-
What happens to an overdamped system after an initial displacement?
- Rapid oscillation
- Constant vibration
- Slow return
- Infinite amplitude
-
What must the driving frequency equal for resonance to occur in an oscillating system?
- Half natural frequency
- Natural frequency
- Double natural frequency
- Zero frequency
-
The natural frequency of a system is the frequency of its:
- free oscillations
- damped oscillations only
- external driving force
- forced oscillations only
-
What effect does increased damping have on the resonance peak of an oscillator?
- Flatter and narrower
- Taller and broader
- Flatter and broader
- Taller and narrower
-
What is the main purpose of shock absorbers in vehicle suspensions?
- Damp oscillations quickly
- Eliminate friction forces
- Increase natural frequency
- Prevent energy transfer
-
Why are soldiers instructed to break step when marching across a bridge?
- To lower speed
- To reduce mass
- To prevent resonance
- To increase damping
-
What happens to forced oscillation amplitude at driving frequencies much higher than natural frequency?
- Increases linearly
- Equals maximum amplitude
- Becomes very small
- Becomes infinitely large
-
Which two properties determine the natural frequency of a simple mass-spring system?
- Driving frequency only
- Damping coefficient only
- Mass and stiffness
- Amplitude and phase
-
What phenomenon occurs when a system is driven at its natural frequency?
- Resonance
- Overdamping
- Critical damping
- Phase cancellation
-
What is the theoretical amplitude of an undamped system driven at resonance?
- Zero
- Infinite
- Constant
- Equal to driver
-
Which process enables a singer's voice to shatter a wine glass?
- Refraction
- Polarisation
- Diffraction
- Resonance
-
What causes the reduction in amplitude of a freely oscillating pendulum over time?
- Resonance
- Gravitation
- Damping
- Inertia
-
Which type of damping allows an oscillator to return to equilibrium fastest without oscillating?
- Critical damping
- Overdamping
- Underdamping
- Light damping
-
Which factors determine the amplitude of an oscillator in steady-state forced oscillation?
- Phase angle only
- Initial displacement only
- System temperature only
- Frequency and damping
-
Where is energy transferred during the damping of free oscillations?
- To the driver
- To the surroundings
- Into potential energy
- To the nucleus
-
Which feature makes the resonance peak broader on an amplitude-driving frequency graph?
- a larger mass
- lighter damping
- heavier damping
- a higher driving amplitude
-
At resonance, the phase difference between the driving force and the displacement of a forced oscillator is:
- pi/2 rad
- 0 rad
- pi rad
- 3 pi/2 rad
-
At what frequency does a system vibrate during steady-state forced oscillation?
- Resonant frequency
- Natural frequency
- Driving frequency
- Double natural frequency
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