Tag: sound: production of sound

Quizzes (4) Questions (118)

Questions Related to sound: production of sound

Multiple choice physics sound: production of sound oscillation - amplitude, time period and frequency of oscillation time period, frequency and amplitude of sound oscillatory and periodic motion

Which of the following equation does not represent a simple harmonic motion:

  1. $y=a\sin\omega t$

  2. $y=b\cos\omega t$

  3. $y=a\sin\omega t+b\cos\omega t$

  4. $y= a\tan\omega t$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

SHM requires a restoring force proportional to displacement, resulting in a sine or cosine function of time. Tangent functions do not represent SHM.

Multiple choice physics sound: production of sound oscillation - amplitude, time period and frequency of oscillation time period, frequency and amplitude of sound oscillatory and periodic motion

What is the number of degrees of freedom of an oscillating simple pendulum?

  1. more than three

  2. 3

  3. 2

  4. 1
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

There are 2 degrees of freedom, 1 translational along which the pendulum bob moves, and second rotational - the hinge about which it forms an arc motion.

Multiple choice physics sound: production of sound oscillation - amplitude, time period and frequency of oscillation time period, frequency and amplitude of sound oscillatory and periodic motion

Simple harmonic oscillation of a given system can be specified completely by stating its: 

  1. amplitude, frequency and initial phase.

  2. amplitude, frequency and wavelength

  3. frequency and wavelength.

  4. frequency, wavelength and initial phase.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Although waves consist of oscillation, there is no wavelength in a pure oscillation. It is there only in waves. 

Multiple choice physics sound: production of sound oscillation - amplitude, time period and frequency of oscillation time period, frequency and amplitude of sound oscillatory and periodic motion

Simple harmonic motion (SHM) is a technical term used to describe a certain kind of idealized oscillation. Practically all the oscillations that one can see directly in the natural world are much more complicated than SHM. Why then do physicists make such a big deal out of studying SHM?

  1. It is the only kind of oscillation that can be described mathematically

  2. Any real oscillation can be analysed as a superposition (sum or integral) of SHMs with different frequencies

  3. Physics is concerned mainly with the unnatural world.

  4. Students are too stupid to appreciate the real world.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Simple harmonic motion provides a basis for the characterization of more complicated motions through the techniques of Fourier analysis. Here any waveform can be represented as closely as desired by the combination of a sufficiently large number of sinusoidal waves that form a harmonic series.   Fourier's theorem suggests that any periodic function can be represented as an algebraic sum of sine and cosine functions called a Fourier Series. 

Multiple choice physics sound: production of sound oscillation - amplitude, time period and frequency of oscillation time period, frequency and amplitude of sound oscillatory and periodic motion

Which of the following conditions must be satisfied for a body to oscillate or vibrate?
A: The body must have inertia to keep it moving across the mid point of its path.
B: There must be a restoring force to accelerate the body towards the midpoint.
C: The fractional force acting on the body against its motion must be small.

  1. Only A

  2. Only A and B

  3. Only B and C

  4. All A, B and C
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Oscillatory motion requires inertia (to overshoot the equilibrium), a restoring force (to return to equilibrium), and minimal friction (to prevent rapid damping).

Multiple choice physics sound: production of sound oscillation - amplitude, time period and frequency of oscillation time period, frequency and amplitude of sound oscillatory and periodic motion

An object swinging on the end of a string forms a simple pendulum. Some students (and some texts) often cite the simple pendulum's motion as an example of SHM. That is not quite accurate because the motion is really

  1. approximately SHM only for small amplitudes

  2. exactly SHM only for amplitudes that are smaller than a certain value

  3. approximately SHM for all amplitudes.

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

An object performing SHM moves along a straight path.

For large amplitudes, a pendulum moves in a curved path.