The frequency of a sine wave is how often the wave repeats itself. It is usually measured in Hertz abbreviated Hz , sometimes also called "cycles per second". People will hear the frequency of a sine wave as pitch, i. Frequency and amplitude are independent of each other. Audio and radio signals carried on electrical wires are also examples of alternating current. Alternating current A. C is five times more dangerous than Direct current D.
The frequency of the alternating current is the main reason for this severe effect on the human body. The frequency of 60 cycles is in an extremely harmful range.
At this frequency, even a small voltage of 25 volts can kill a person. As the coil rotates the voltage decreases according to the sine of the angle until the conductor is parallel to the magnetic field. Further rotation then increases the voltage until once again it is at a maximum but in the opposite direction. For each revolution a complete sine wave is generated. In other words, it is an s-shaped, smooth wave that oscillates above and below zero.
Technically there are no sine waves in nature. The sinusoidal functions are just pure mathematical concepts that can be used to approximately describe some physical phenomena. Laser light is a single frequency. White light however is light made up of the sum of different wavelengths of light. According to Wikipedia, The sine wave or sinusoid is a mathematical function that describes a smooth repetitive oscillation.
Explanation of sine wave amplitudes. Peak value of sine wave means the maximum value found on a sinusoidal waveform compared to the zero level. Other commonly used amplitude values are root mean square and peak-to-peak. In the proposed method, each half-cycle of the fundamental frequency consists of a number of half-sine waves with different amplitudes and widths, which are arranged side-by-side.
In product qualification programs, shock testing is used to measure the impact of sudden acceleration caused by explosion, drop, or collision. Though sometimes compared to vibration testing, shock testing uses a specific type of force to simulate real-world use. The effective value of a sine wave is more commonly known as the Root Mean Squared or simply RMS value as it is calculated as the square root of the mean average of the square of the voltage or current.
Radio waves are very high speed variations in the electromagnetic field that is present in all of space. For a pure radio wave, this too is a sinusoidal variation. That is, the field is varying in the shape of a sine wave millions or more times per second. The amplitude of a sine wave is the maximum distance it ever reaches from zero. In general, a sine wave is given by the formula In this formula the amplitude is A.
In electrical voltage measurements, amplitude is sometimes used to mean the peak-to-peak voltage V pp. This number will be twice the mathematical amplitude. The frequency of a sine wave is the number of complete cycles that happen every second. A cycle is the same as the period, see below. In the bouncing weight above, the frequency is about one cycle per second. Frequency used to be measured in cycles per second, but now we use the unit of frequency - the Hertz abbreviated Hz.
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