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Why is electricity transmitted at a high voltage?
To move the energy through the lines to reach the farthest user, electricity leaves the power plant at 24,000 volts to a transformer area, there it is increased to 304,000 volts which is used to move the energy through out the service area and reduced back down to be accepted in your house or place of business
Why is there a harmonics when there is no load?
Harmonics is electric current or voltages that are part of the power system as a result of nonlinear electric loads. If there is no load and a harmonic is present it can present because of a rectifier in the system.
Why is electrical power transmitted in high voltage and not high current?
For any given load, the higher the supply voltage, the lower the resulting load current. A lower load current results in an acceptable voltage drop along the line, that conductors with lower cross-sectional areas can be utilised, and line losses are minimised. So high voltages are essential for energy (not 'power') transmission.
Why is alternating current low voltage?
Alternating current is not necessairly low voltage, on the controrary AC is more oftenly used for when high voltage is needed. Most power distribution systems (extremely high voltages) use AC because AC is easier to transform to high voltages (using the aptly named transformer). High voltage is needed for power distribution to decreases losses due to transmission.
Why do the readings differ for increasing and decreasing values of the incandescent lamp voltages?
...what readings? current? voltage? power? lux?
Do voltages vary around the circuit and why?
A: Voltages varies on a circuit because current varies caused by difference in resistance
Electric current from a generating plant is?
Electric current from a generating plant is typically alternating current (AC), which flows back and forth in a rapid and regular manner. This AC current is then transmitted through power lines to homes and businesses for use in electrical appliances and devices.
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.
Why is electric current produced by power plants is transmitted as alternating current?
Because AC allows the power to be transmitted over distance at high voltage and then transformed down for the users.
Why is AC power transmitted to buildings instead of DC power?
AC power is transmitted to buildings instead of DC power because AC power can be easily converted to different voltages using transformers, making it more efficient for long-distance transmission. Additionally, AC power is better suited for powering devices that require alternating current, such as motors and appliances.
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.
What is over frequency?
when the current increases in voltages.
In an electric bell the electric current stops again and again?
The electric bell and the electric current stops over and over again because of the fluctuations in voltages.
What is the meaning of voltages?
D.C. stands for direct current. A.C. is alternating current.
HOw does electricity get transported and why does it need to be at a high voltage?
The primary reason that power is transmitted at high voltages is to increase efficiency. ... The higher the voltage, the lower the current. The lower the current, the lower the resistance losses in the conductors. And when resistance losses are low, energy losses are low also.
Which is more dangerous AC current or DC current when the voltages are equal?
either one, neither one
Is AC or DC safer for electrical systems?
AC (alternating current) is generally considered safer for electrical systems because it is easier to control and can be easily converted to lower voltages. DC (direct current) can be more dangerous at higher voltages and is more likely to cause muscle contractions and other serious injuries.
