0
f = 1/T
e.g. What frequency has a period of 2 ms? (2 milliseconds)
f = 1/0.002 = 500 Hz.
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T = 1/f
e.g. Find the period of T = 250 Hz
T = 1/250 = 0.004 ms.
For a wavelengt lambda in air with the speed of sound of c = 340 meters per second the frequency f = c / lambda or lambda = c / f.
There is a useful calculator for converting wavelength to frequency and vice versa.
Scroll down to related links and look at "Acoustic waves or sound waves in air".
The formula that links frequency to wavelength is v = f * lambda, where v is speed with units of meters per second (m/s), f is frequency with units of hertz (Hz or 1/s), and lambda is the wavelength with units of meters (m). Given frequency and speed, one can easily find the wavelength by solving the given equation to get lambda = v / f. Conversely, if given wavelength and speed, one can easily find the frequency by solving the given equation to get f = v / lambda.
Frequency means how often sometimes happens. The unit hertz is equivalent to 1/second. For example, if something repeats 60 times per second (the typical frequency of electrical current in some areas), it has a frequency of 60 hertz.
The formula of frequency is: f=1/T
where:
- T is period, in seconds
- f is frequency, in hertz
Alternating current usually has a frequency of 60 cycles per second. This is not determined by a formula, it is determined by the rotations per second of the turbine which generates the current.
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How can you block ac current?
You can block AC current by using a filter with a pass-band that is outside the frequency of the AC current.
How does a frequency inverter work?
A frequency converter converts alternating current of one frequency to alternating current of another frequency. Generally it's used for controlling the ac motor speed by changing the supply frequency.
What measurement can vary with AC current by not DC current?
HZ. Hertz is the name given to the frequency of the alternating circuit. Direct current (DC) has no frequency since one wire is always positive and the other is always negative; but AC (Alternating Current) rapidly changes polarity, and does so at a rate that is defined by HZ.
Ac vs DC current?
DC (direct current) means the current flows only in one direction. In AC (alternating current), the current changes direction continuously (for example, 50 or 60 cycles per second).
What is the gereral references difference between ac and dc?
AC is mainly having frequency i.e., cycles per second.as the name suggest that it is alternating current DC is not having any cycles so, it is not having frequency
What is frequency of Ac in EgyBt?
frequency of AC current in egyptis 50 c/s
How can you block ac current?
You can block AC current by using a filter with a pass-band that is outside the frequency of the AC current.
Is voltage related to frequency?
Voltage and frequency are related in AC (alternating current) systems. In AC circuits, voltage is directly proportional to frequency according to the formula V = 2πfL where V is voltage, f is frequency, and L is inductance. This relationship is important in analyzing and designing electrical systems.
Does dc have hertz?
No.
Do strobe lights use ac or dc current to flash?
Strobe lights use ac or alternating current to flash. The frequency of 50 Hz is alternating current's frequency, coming in handy for its flashing.
What is the difference between current (DC) and alternating current (AC)?
ac comes directly from the power socket, and DC is battery source. Answer2: The frequency is the difference, AC has frequency f>0 and DC does not f=0.
What is the purpose of a frequency converter?
A frequency converter converts "alternating current (AC) of one frequency to alternating current of another frequency." (Wikipedia) They are used to control the torque and speed of AC Motors. For more information go here: http://en.wikipedia.org/wiki/Frequency_changer.
What is frequency the current alternates in the US?
In the US AC current oscillates at 60 Hz.http://www.answers.com/alternating+current
How does a frequency inverter work?
A frequency converter converts alternating current of one frequency to alternating current of another frequency. Generally it's used for controlling the ac motor speed by changing the supply frequency.
What kind of electricity used in train?
Ac current. Ac current is easily controlled for voltage and frequency. The diesel engine runs a generator that generates AC current for use in the electric drive motors on each drive wheel.
What measurement can vary with AC current by not DC current?
HZ. Hertz is the name given to the frequency of the alternating circuit. Direct current (DC) has no frequency since one wire is always positive and the other is always negative; but AC (Alternating Current) rapidly changes polarity, and does so at a rate that is defined by HZ.
Why do you not consider frequency in direct current?
Although DC current can vary in voltage and current over time, it does not reverse polarity, which in AC occurs some distinct number of times per second (hertz) which is the frequency.
