Lissajous figure, also called Bowditch Curve, pattern
produced by the intersection of two sinusoidal curves the axes
of which are at right angles to each other. … If the frequency and phase angle of the two curves are identical, the resultant is a straight line lying at 45° (and 225°) to the coordinate axes
What is Lissajous figures in SHM?
If two S.H.M’s act in perpendicular directions, then their resultant motion is in the form of a straight line or a circle or a parabola etc.
depending on the frequency ratio of the two S.H.M. and initial phase difference
. These figures are called Lissajous figures.
What are lissajous curves used for?
A Lissajous curve is used in
experimental tests to determine if a device may be properly categorized as a memristor
. It is also used to compare two different electrical signals: a known reference signal and a signal to be tested.
What is Lissajous figure Mcq?
Explanation: A Cathode Ray Oscilloscope cannot measure or display Time invariant signals. However, it can measure both AC and DC signals. … Explanation: The pattern observed on the CRT, when
two sinusoidal signals are applied to the X-X and Y-Y plates of the CRT
are known as Lissajous pattern.
Where do Lissajous figures appear?
A Lissajous figure is displayed
on the screen when sinusoidal signals are applied to both horizontal & vertical deflection plates of CRO
. Hence, apply the sinusoidal signals, which have same amplitude and frequency to both horizontal and vertical deflection plates of CRO.
What are lissajous curves and how are they generated?
Lissajous figure, also called Bowditch Curve,
pattern produced by the intersection of two sinusoidal curves the axes of which are at right angles to each other
.
What are the application of Lissajous figures?
Some applications are described including
phase, frequency, and period determination of periodic signals
, time-domain characteristics (such as damping ratio) of a control system, and abnormality and spike detection within a signal, are described.
What is Alpha in SHM?
The constant α is called
the phase shift of the motion
(and as we saw above can be taken as 0 if the particle begins at the origin). From our knowledge of the trigonometric functions, we see that the amplitude of the motion is C and the period is 2πn.
How does frequency affect Lissajous figures?
If one frequency is an integral multiple (harmonic) of the other, the pattern will be stationary
, and is called a Lissajous figure. Typical Lissajous figures are shown in Figs 7.31 and 7.32 for sinusoidal frequencies which are equal, integral and in ratio.
How is the frequency of unknown signal determined?
The unknown frequency of the signal is determined by
the direct measurement method, observation of Lissajous curves and beats observations
. Lissajous Curves: … We turn off the time base and set the standard generator to the frequency determined in the previous measurement.
Why Zener diodes are provided in DC supply?
5. Why zener diodes are provided in dc supply? Explanation: Zener diodes in dc power supplies are
used for providing a reference voltage used for comparison
. Explanation: Stability of zener diodes used is an important factor in determining the stability of output voltage in dc power supply.
Is CRO is used to measure?
CRO is a very versatile instrument in the laboratory for measurement of
voltage, current, frequency and phase angle of
any electrical quantity. … These are used to measure the frequency of the given signals and phase difference between the signals.
Which part is called as heart of CRO?
The main part of CRO is
CRT (cathode ray tube)
. This is reason why CRT is called the heart of CRO.
How do you find the Lissajous pattern?
To determine the ratio of frequencies of signal by using the Lissajous pattern,
simply draw arbitrary horizontal and vertical line on lissajous pattern intersecting the Lissajous pattern
. Now count the number of horizontal and vertical tangencies by Lissajous pattern with these horizontal and vertical line.
What are the advantages of Lissajous patterns?
Uses of Lissajous Figures
Lissajous Figures is used as:
Determining an unknown frequency by comparing it with a known frequency
.
Checking audio oscillator with a known-frequency signal
and find the frequency. Checking audio amplifiers and feedback networks for phase shift.
