Tag: oscillation and waves

Questions Related to oscillation and waves

Which of the following works on the principle of forced vibration?

free, damped and forced oscillations free, forced and damped oscillations oscillations oscillation and waves physics

  1. Guitar

  2. Tuning fork

  3. Drum

  4. All of the above

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Correct Option: D
Explanation:

Forced vibration is an action in which periodic repetitive and oscillatory force is applied on an object. In this condition, the object is forced to vibrate with the frequency of the applied force. Hence all are forced vibrations.

A motion caused by an unbalanced rotating component is an example of

free, damped and forced oscillations free, forced and damped oscillations oscillations oscillation and waves physics

  1. free vibration

  2. forced vibration

  3. natural vibration

  4. None of these

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Correct Option: B
Explanation:

A motion of an unbalanced rotating component is an example of forced vibration. As to rotate it with the unbalanced condition some external agent is required.

Resonance is an example of

free, damped and forced oscillations free, forced and damped oscillations oscillations oscillation and waves physics

  1. forced oscillation

  2. damped oscillation

  3. free oscillation

  4. none of these

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Correct Option: A
Explanation:

Resonance is an example of forced oscillation.

Fill in the blank.
In vibrational motion, ____in amplitude results in ______in loudness.  

free, damped and forced oscillations free, forced and damped oscillations oscillations oscillation and waves physics

  1. decrease, increasing

  2. increase, decreasing

  3. increase, increasing

  4. decrease, decreasing

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Correct Option: C
Explanation:

In vibrating motion increase in amplitude results in increase in loudness.

The oscillation of a body or system with its own natural frequency and under no external influence other than the impulse that initiated the motion is known as:

free, damped and forced oscillations free, forced and damped oscillations oscillations oscillation and waves physics

  1. Damped oscillation

  2. Free oscillation

  3. Impulsive oscillation

  4. None of these

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Correct Option: B
Explanation:

The oscillation of a body or system with its own natural frequency and under no external influence other than the impulse that initiated the motion is known as free oscillation.

In case of forced oscillation, the resonance peak becomes very sharp when the

free, damped and forced oscillations free, forced and damped oscillations oscillations oscillation and waves physics

  1. restoring force is small.

  2. damping force is small.

  3. quality factor is small.

  4. applied periodic force is small.

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Correct Option: B
Explanation:

Lesser the damping force more sharp is the resonance peak.

At resonance, the amplitude of forced oscillations is

free, damped and forced oscillations free, forced and damped oscillations oscillations oscillation and waves physics

  1. minimum

  2. maximum

  3. zero

  4. none of these

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Correct Option: B
Explanation:

At resonance the amplitude of forced oscillations is maximum.

A particle of mass 0.10 kg executes Simple harmonic motion with an amplitude 0.05 m and frequency 20 vib/s. Its energy of oscillation is

free, damped and forced oscillations free, forced and damped oscillations oscillations oscillation and waves physics

  1. 2 J

  2. 4 J

  3. 1 J

  4. zero

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Correct Option: A
Explanation:

$E = \frac{1}{2}m{\omega^2}{A^2}$

$ = \frac{1}{2} \times 10 \times {\left( {2\pi  \times 20} \right)^2} \times {\left( {0.05} \right)^2}$
$ = 2J$
Hence,
option $(A)$ is correct answer.

The displacement of particle in S.H.M. is indicated by equation $y=10{\,}sin(20t+\pi/3)$where y is in meters. The value of time period of vibration will be (in seconds):

free, damped and forced oscillations free, forced and damped oscillations oscillations oscillation and waves physics

  1. $10/pi$

  2. $pi/10$

  3. $2\pi/10$

  4. $10/2\pi$

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Correct Option: A

A watch becomes fast by 5 minutes in a day. In the watch makers shop, it keeps correct time. It is due to :

free, damped and forced oscillations free, forced and damped oscillations oscillations oscillation and waves physics

  1. natural vibrations

  2. forced vibrations

  3. damped vibrations

  4. none of these

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Correct Option: B
Explanation:

In watchmakers' shop watch is oscillated with forced vibrations, so it has keeps correct time there. By itself, watch performs oscillations at natural frequency which is faster.