2006-11-27 17:11:36 · 10 answers · asked by jun s. 1 in Science & Mathematics ➔ Engineering
For a simple answer frequency applies only to alternating current.
If you want to get more technical then DC can have frequency if you use something like a thyristor (SCR) to produce stepped DC. But this is used for simulating AC when you are using a load that requires AC and DC. An example of this would be the control circuit for a reluctance motor.
2006-11-27 17:22:47 · answer #1 · answered by cheezelord 2 · 1⤊ 0⤋
A good example of a circuit with both DC and AC response is found in the operational amplifier. But you don't think of it as an AC circuit or a DC circuit that has an operating frequency. Instead, you think of it as an amplifier whose bandwidth extends from DC to a frequency that is measured in Hertz. At DC, the frequency is zero.
2006-11-27 21:38:10 · answer #2 · answered by Tech Dude 5 · 0⤊ 0⤋
DC has zero frequency.. Wat s frequency? It is the number of times the signal or wave changes per second.. In a dc signal, seeing the graph, u can recognise it as a unit step sequence.. Hence no changes occurs.. It has an amplitude.. Which may decrease slightly after a time..(in batteries, where u have a graph resembling tat of a decaying exponential,, though it is not 2 b called so)..... But that doesnt mean it has frequency.. It does not reach its maximum once it starts decreasing.. Hence, the frequency is 0 for a dc signal..
2006-11-27 23:44:36 · answer #3 · answered by ((Gaining knowledge.) 2 · 0⤊ 0⤋
DC is defined (by me) as being the "Positive stay positive and the Negative stays negative".
That doesn't mean that the voltages cant vary. The positive could become more positive etc. For instance you could have 110VAC added to say 400VDC. now assuming the peak voltage is approx 190V for 110VAC then the addition of the two will give you a DC wave form of 590VDC to a minimum of 210VDC with say 60Hz however the positive will remain positive and the neg will remain negative. The wave will occur above zero.
2006-11-27 20:04:51 · answer #4 · answered by slatibartfast 3 · 0⤊ 0⤋
DC also can have frequencies, the only difference is the polarity of the signal. It will not go to negative from positive and vice versa, instead it (signal amplitude) varies from supply voltage to zero and vice versa.
2006-11-27 20:19:51 · answer #5 · answered by Saravanan S 1 · 0⤊ 0⤋
The resonant frequency of an LRC circuit is: omega0 = 1 / sqrt (LC) Solve for your inductance: L = 1 / (omega0^2 C)
2016-03-28 22:30:50 · answer #6 · answered by Anonymous · 0⤊ 0⤋
Look up Interupted Direct Current
2006-11-27 17:19:57 · answer #7 · answered by Answers 5 · 0⤊ 0⤋
check out amplitude modulation or am radio for that answer. but usually no.
2006-11-27 17:15:39 · answer #8 · answered by dave c 1 · 0⤊ 0⤋
Pretty good arguments.
2016-08-23 11:32:01 · answer #9 · answered by Anonymous · 0⤊ 0⤋
Not totally sure about this
2016-07-28 04:21:54 · answer #10 · answered by ? 3 · 0⤊ 0⤋