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Electric power is transferred over large distances at very high voltages Explain how the high voltage reduces power losses in transmission lines?
The conductor used to transmit power has a specific resistance at the given power frequency. Power transmitted is equivalent to I^2 * R, so as the current increases, the power loss from the conductor also increases. To maximize efficiency, power is converted to very high voltages, which decreases the current, which minimizes the power lost in transmission.
AnswerThe primary reason for using high voltage transmission lines is because, for a given load, the higher the voltage, the lower the load current. Low voltages would require cables of enormous cross-sectional area making transmission impossible, whereas high voltages allow the use of manageable-sized conductors. A secondary reason is the corresponding reduction in line losses -as described above.
What else can I help you with?
Why AC is used in preference to DC?
It is much more efficient to transmit AC over long distances. Because using transformers you can convert to very high voltages, and then power transmission then involves much lower currents, so that losses in the transmission line I2R are much reduced. You cannot easily and efficiently convert DC to high voltages.
What is Grounding and shielding in electronics instrument?
in an electric circuit, it is treated as a reference from which other voltages can be measured. also it acts as a common return path of electric current leakages
What is the difference between a transmission grid and an electricity grid?
The terms transmission grid and electrical grid are somewhat interchangeable. The electrical grid, or power grid, is the network used to get electric power from where it is generated to all the places that use it. The one difference might be that a transmission line or grid might be thought of as the network of high voltage long distance lines. These are used to move large amounts of power with minimal loss through the use of extremely high voltages. These long distance lines connect generation facilities with substations, and it is at the substation that the voltages are stepped down, and that power is then put on the electrical grid.
Why electricity is produced upto 6.6kv or 11 kv in power plant but our requirement is only 440 volt?
It is mainly for transportation, especially over longer distances, that higher voltages are used. At higher voltages, less current is required - and power losses are proportional to the square of the current.
Why are both negative and positive voltages generated as the magnet passes through the coil?
In this context, 'negative' and 'positive' are used to indicate the sense, or direction, of the induced voltages, as voltages do not have electric polarity (+ or -). The direction of the voltage induced into a conductor is determined by the direction of that conductor relative to the magnetic field. As the coil rotates, the directions of each side of the coil reverse relative to the field, and the induced voltages reverse too.
What are the voltages in secondary transmission electric lines?
A: Those voltages are called distribution voltages to differentiate from transmission voltages. And that varies from state to state and locals . Usually around 10kv to 20 kv
Why are transmission voltages in multiples of 11?
Transmission voltages are in multiples of 11 to allow for 10% transmission line losses. Therefore, to obtain 100% efficiency, voltages in multiples of 11 are transmitted.
What is the main advantage of using alternating current in the power grid?
Low loss transmission of power at high voltages for long distances then the ability to transform down to lower voltages near the point of usage, i.e. substations and pole transformers near residences.
What are the standard voltages for transmission?
The standard voltage for transmission is about 115 to 1,200 kV (long-distance transmission). The extreme high voltages are measured more than 2,000 kV and it is exists between conductor and ground.Answer for UKThe standard transmission voltages in the UK are 400 kV and 275 kV. Primary distribution voltages are 132 kV and 33 kV, and secondary distribution voltages are 11 kV and 400 V. These are all line voltages -i.e. voltages measured between line conductors.
What is different about electric and electronics?
The difference between electric and electronics is that electric operates at very high voltages while electronics operate at low voltages typically between 0-48volts.
Why is electricity in power stations generated at 25000 v?
Electricity is generated at high voltages, such as 25,000 V, because it reduces the loss of energy during transmission over long distances. Higher voltages mean lower current, which results in reduced heat losses in the transmission lines. This allows more efficient and cost-effective distribution of electricity to homes and businesses.
How are step up transformers used in the transmission of electric energy?
Step-up Transformers used in the transmission of electrical energy increase the voltage going over Transmission Lines (over 100,000 Volts). For a given amount of POWER to be Transmitted, the higher the Voltage, the LOWER the CURRENT. This reduces the amount of Power LOST to the Resistance of the Transmission Lines. Power Lost is calculated by the Formula: POWER Lost = I2 x R, where I=Current and R=Resistance So, the lower the Current (I), the lower the transmission line losses. At the end of the Transmission Path the Voltage is "Stepped Down" to a value usable for the Customer, usually (220 volts for Residential use in the USA).
Why is the alternating current voltage increased?
In order to be transmitted long distances, voltage is raised. At the destination, voltage is lowered again to be used. This permits transmission for several miles, which wold not be possible at lower voltages.
Do you transmit electric power via transmission lines at 50Hz or at some higher KHz?
Transmission lines also use 50 Hz. Transforming to lower voltages would become very complicated when also the frequency would have to be changed.
How are lower voltages combined into higher voltages for transmission?
Low voltages are not 'combined into higher voltages' for transmission! The lower voltage (e.g. the voltage generated at a power station) is applied to the primary winding of a large power transformer, and the required higher transmission voltage then appears across the transformer's secondary winding. The magnitude of the secondary voltage is determined by the turns ratio of the transformer's windings.
What is the name of the fish that can generate electric fields?
an electric eel. capable of producing high voltages when threatened.
How does the power station deliver electricity to houses?
The power station delivers electricity to houses through a network of power lines and transformers. The electricity is transmitted at high voltages over long distances through transmission lines, which are then stepped down to lower voltages by transformers before being distributed to individual homes through power lines.
