What are the Lissajous figures in physics?
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 Lissajous figures give examples?
For example, a ratio of 31 or 13 produces a figure with three major lobes (see image). Similarly, a ratio of 54 produces a figure with five horizontal lobes and four vertical lobes.
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 is the Lissajous figure Mcq?
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. Here, the voltages are unequal and frequencies are equal with a phase shift of 90°. Therefore the Lissajous figure on the screen will be an ellipse.
What is meant by Lissajous figure?
: any of an infinite variety of curves formed by combining two mutually perpendicular simple harmonic motions, commonly exhibited by the oscilloscope, and used in studying frequency, amplitude, and phase relations of harmonic variables.
What are Lissajous figures used for?
The lissajou figures are used to determine the unknown frequency by comparing it with the known frequency. Verifying audio oscillator with a known-frequency signal.
What is the current transformer Mcq?
A current transformer is a device that is used for the transformation of current from a higher value into a proportionate current to a lower value. The ratio of the primary current and the secondary current is known as a current transformer ratio of the circuit. The current ratio of the transformer is usually high.
How will you calculate the frequency ratio from the shape of Lissajous figures?
To determine the frequency from any Lissajous figure, count the number of horizontal loops in the pattern, divide it by the number of vertical loops and multiply this quantity by fh (known or standard frequency).
What are the factors on which shape of Lissajous figure depends?
The shape of Lissajous figures depends on frequency and phase relationship of 2 sine waves. 2 sine waves of same frequency and amplitude may produce a straight line an ellipse or a circle depending on their phase difference.
What is CT ratio in transformer?
Ratio. The CT ratio is the ratio of primary current input to secondary current output at full load. For example, a CT with a ratio of 300:5 is rated for 300 primary amps at full load and will produce 5 amps of secondary current when 300 amps flow through the primary.
How are Lissajous figures displayed on the screen?
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.
How are the patterns in a Lissajous figure different?
These patterns will vary based on the amplitudes, frequencies and phase differences of the sinusoidal signals, which are applied to both horizontal & vertical deflection plates of CRO. The following figure shows an example of Lissajous figure.
How is the lissajou figure named after the inventor?
The lissajou figure is also known as the Bowditch curve, named after the inventor. The lissajou figure or the lissajou pattern is constructed by the intersection of two sinusoidal curved axes of which are perpendicular to each other or maintained at right angles to each other.
How is the Lissajous figure created in Cro?
The Lissajous figure constructed will be illustrated on the CRO screen. To obtain the lissajou figure, we must apply the sinusoidal signals to both horizontal & vertical deflection plates of CRO. Therefore, supply the sinusoidal signal, whose frequency is known to the horizontal deflection probe of CRO.
