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The main source of direct current is the conversion of alternating current. Typically, AC is a sinusoidal waveform. Using what is called a full-wave rectifier, one can make all of the negative halves of the waveform positive. This means the waveform will have a series of humps in the positive region. This, however, is not usable DC yet; one must use a filter, or a series of filters, to smooth out the waveform until it is roughly linear and constant. The resultant signal is direct current. This is roughly what is contained within power adapters that you plug into your electronics from the AC wall outlet; they convert the AC signals to DC so the electronics can use the electricity.
There are many reasons for doing it this way. Mainly, though, AC power is easier to produce and more efficient to transmit over long distance. DC, however, is often more usable, so the AC is converted after transmission.
Another example of a DC source are solar panels, or photovoltaic cells, which produce electricity when hit by light.
What else can I help you with?
What is an ac and DC generator?
An a.c. generator produces alternating current, whereas a d.c. generator produces direct current.
Which is better for transmission alternating current and direct current?
Alternating current is better than direct current for transmission.
What is DC in electric stand for?
Volts direct current eg battery As opossd to Vac wich is volts altinating current eg mains supply
Lightning carries Alternating current or Direct Current?
Power lines carry electricity as alternating current.
Reactive current through the inductive load produces?
Reactive current through inductive load produces -- Magnetic field
What piece of equipment is used to produce electricity?
Some possible answers are: a battery (which produces direct current) or a generator of electricity generator, such as a dynamo (which produces direct current) or an alternator (which produces alternating current).
What is an ac and DC generator?
An a.c. generator produces alternating current, whereas a d.c. generator produces direct current.
What kind current is produced by a dry cell?
A dry cell produces direct current (DC) when a chemical reaction within the cell generates a flow of electrons in one direction. This current flows from the negative terminal to the positive terminal of the cell.
Is it true that a battery produces alternating current?
No. A battery produces DC, or Direct Current.
Does a dry cell battery produce alternating current or direct current?
directA dry cell battery produces DC.
What is the purpose of a magnetic field produced by charges in a current?
Depends whether Direct Current or Alternating Current. Only Alternating Current produces magnetic field.
What type of current does a storage battery porduce?
A storage battery produces direct current (DC). This type of current flows in a constant direction from the positive terminal to the negative terminal of the battery.
Does a dry-cell battery produce the same current that a generator produces?
A dry cell produces direct current, which means that the current flows from one terminal of the dry cell to the other in one direction only. The word generator nowadays often means a device that produces alternating current, which is to say current that reverses its direction, usually at a fixed rate called the frequency. For instance, the current available in North American homes is alternating current at 60 cycles per second; it reverses direction 120 times per second. A machine that produces current that resembles what is available from a dry cell is often called a dynamo. These devices are similar to generators but with switches in them to change the alternating current to direct current, in effect. The current they produce is still not quite like that from a dry cell inasmuch as it's not perfectly 'smooth' continuous direct current. There's a ripple of slightly higher and lower current superimposed on the direct current. Please see the link, especially the graph associated with the Gramme dynamo.
What does an alternator produce?
An alternator produces direct current that is used to charge up the battery while the car is running.
Which type of current does lightning has?
unfortunatley i cant tell for sure what you mean because of the lack of grammer (not insalting you) but if your asking wether it has direct current (DC) or alternating current (AC) like i think you are than the answer is direct current (DC)
Does a generator produce direct current or alternating current?
A generator produces an alternating current, still it gives d.c. output because we use slip-rings at the terminals of actual output of generator.
What type of electrical current is in most automobiles?
The typical automobile operates on DC (Direct Current) even though the typical alternator produces AC (Alternating Current) which is then converted to DC.
