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First of all, it's energy that's being transmitted, not power! Power merely tells us the rate at which energy is being transmitted.
Next, it's a complete misconception to think that energy is delivered by electrons which, then, return to the source to collect more energy -rather like a conveyor belt! Electrons move far too slowly for that to happen (an individual electron is unlikely to travel the length of a flashlight's filament before the battery runs down!). It's far more likely that energy is delivered in the space around (rather than through) the supply wires due to a combination of the electric and magnetic fields, called the 'Poynting Field' (check this out on the internet).
Finally, if we think of 'positive' power as the rate at which energy is being transmitted in the 'forward' direction (i.e. from the source to the user) then, during the negative half-cycles of a.c. current and voltage, the product (P =EI) is still positive. So it matters not whether it is being 'delivered' by d.c. or a.c.
What else can I help you with?
Is it true that the current supply from electric power generating plants is an alternating current?
Yes, it is true that current supply from generating plants is an alternating current. There is no success found in bulk power generation of direct current ( D.C. ) in a power plant. But yes it is possible to transmit the power in the form of direct current ( High Voltage Direct Current Transmission-HVDC Transmission ) that possible after converting the generated alternating current into direct current with the help of high range converters.
What is the name of the current which reverses direction every half turn?
The current you are referring to is called an alternating current (AC). It changes direction periodically to allow for efficient transfer of electricity in power distribution systems.
Why do transmission lines use alternating current?
Transmission lines use alternating current in order to support stepping-up and stepping-down of the voltage with transformers. Voltage is stepped-up at the power station, sent over the transmission lines, and stepped-down at the receiver. (This is a simplified explanation.) By stepping-up, you reduce the current carrying requirement of the lines, and they can thus be smaller.You could not do this with direct current as transformers only work for alternating current.
What does a transmission system at a radio station use to convert a direct current into a high frequency alternating current?
a high power, often class C amplifier.
Lightning carries Alternating current or Direct Current?
Power lines carry electricity as alternating current.
What type of electric current does a power plant generate for use in your home?
generally power plants produce ALTERNATING CURRENT,because after producing the current the are sent to substations where they are stepped up or stepped down.so a transformer is mainly used over there.for a transformer we cant supply direct current.we should supply only alternating current.so they only produce alternating current................... 4RM PRAJITH
What is one way that alternating current is more useful than direct current-?
alternating current is easier to transfer long distances
Why do transmission lines use alternating current instead of direct current?
Transmission lines use alternating current (AC) instead of direct current (DC) because AC can travel long distances with less energy loss. AC can be easily converted to higher or lower voltages using transformers, which is important for efficient power distribution. Additionally, AC allows for easier control and regulation of power flow in the grid.
What did alternating electrical current effect in the 1920?
The widespread adoption of alternating current in the 1920s revolutionized the electrical power industry by allowing for the efficient transmission of electricity over long distances through high voltage power lines. This enabled the development of large-scale power grids that could supply electricity to homes, businesses, and industries, leading to improved standards of living and economic growth.
What is direct and alternating voltage?
An alternating current (AC) is an electric current whose direction reverses cyclically, as opposed to direct current, whose direction remains constant. The usual waveform of an AC power circuit is a sine wave, as this results in the most efficient transmission of energy.
What is DC power?
Direct current (DC or "continuous current") is the unidirectional flow of electric charge. Direct current is produced by such sources as batteries, thermocouples, solar cells, and commutator-type electric machines of the dynamo type. Direct current may flow in a conductor such as a wire, but can also be through semiconductors, insulators, or even through a vacuum as in electron or ion beams. In direct current, the electric charges flow in the same direction, distinguishing it from alternating current (AC). A term formerly used for direct current was Galvanic current. Direct current may be obtained from an alternating current supply by use of a current-switching arrangement called a rectifier, which contains electronic elements (usually) or electromechanical elements (historically) that allow current to flow only in one direction. Direct current may be made into alternating current with an inverter or a motor-generator set. The first commercial electric power transmission (developed by Thomas Edison in the late nineteenth century) used direct current. Because of the advantage of alternating current over direct current in transforming and transmission, electric power distribution today is nearly all alternating current. For applications requiring direct current, such as third rail power systems, alternating current is distributed to a substation, which utilizes a rectifier to convert the power to direct current. See War of Currents. Direct current is used to charge batteries, and in nearly all electronic systems as the power supply. Very large quantities of direct-current power are used in production of aluminum and other electrochemical processes. Direct current is used for some railway propulsion, especially in urban areas. High voltage direct current is used to transmit large amounts of power from remote generation sites or to interconnect alternating current power grids.
The kind of electricity from the power plant is called?
There are only two kinds of electricity, direct current and alternating current. All power plants now produce alternating current
