When talking about electrical current, AC stands for "alternating current" and DC stands for "direct current." Alternating current is the type of current that comes from a power plant and outlet, in which the current changes directions rapidly. Direct current is the type of current that comes from a battery, where the current is always flowing in the same direction.Continue Reading
Electrical current is simply the transfer of energy by sending electrons through a conductor. The electrons can be sent through the conductor, which is usually a wire, in two different ways. The first way is through alternating current, and the second is through direct current.
Alternating current means that the direction of the current changes back and forth rapidly. Alternating current is the safest way to transfer energy over large distances, and is what is used by the national grid to transport energy from a power plant to buildings. Using a transformer in conjunction with alternating current saves a lot of energy because transformers can easily change the voltage of the power coming through a wire. This means that the power can be divided and sent out into smaller voltages.
Direct current is the type of current that comes from a solar cell or battery. The positive and negative terminals of these power sources never change, so the current runs in the same direction the entire time. Direct current does not allow for power to be efficiently transported over large distances.Learn more about Electricity
According to SunTrust Bank, the current balance represents the actual amount of money in an account on a given day. SunTrust Bank notes that money related to non-finalized transactions is not reflected in the current balance.Full Answer >
Although metals are supposed to be good conductors of electricity and heat, metals like mercury, lead, alloys of iron and chromium, titanium and stainless steel are poor conductors when compared to silver, copper and gold. For example, stainless steel 310 has an electrical conductivity of 1.28 x 10E6 siemens/m, while mercury's electrical conductivity is 1.1 x 10E6 siemens/m. However, silver, which has the highest electrical conductivity of all metals, has a n electrical conductivity of 62.1 x 10E6.Full Answer >
Connecting wires allows an electrical current to travel from one point on a circuit to another, because electricity needs a medium through which to move. In the case of computers, wires are embedded into circuit boards, carrying pulses of electricity that are interpreted as binary signals of zeros and ones.Full Answer >
In general, metals like copper and aluminum are the best conductors of electricity. Good conductors are able to allow electrons to easily flow through.Full Answer >