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Why does alternating current have low power loss factor when transmitted over long distances?
Wiki User
∙ 8y ago
Any write has resistance and electrical energy is converted to heat and magnetism over any distance, but when the distance gets very long this energy loss becomes significant.I actually think that AC looses less energy than does DC, which is why they use AC in the power grid, why I don't really know. I suspect the answer is found in the frequency of the phase shifting, maybe it synchronizes with the metal wire it is conducted through and some kind of resistance lowering resonance arises. That is really just a guess. In standig wave theory some frequencies are transmitted better
(less loss of F signal(t) dt = (do math) = energy received by wave at meassuring station, divide that with the same calculation at the source and you have the transmittance efficiency, siganl(t) expresses voltage (ampltude)
at a point in time) in certain types of confinements, which is why the frequencies change in accustic instruments. Maybe something similar is happening with AC. Of course one could do the QM math and provide a real answer, but I am not going to work hard for this :)
Wiki User
∙ 8y ago
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Is it possible to measure power factor for dc system?
noAnswer'Power factor' is a quantity associated with alternating-current systems, and does not apply to direct-current systems'.
If you have to add two alternating voltages how to add them?
A: Alternating voltages means the phase factor must be considered.
How do you calculatePower Factor of Inverter?
Power Factor is a technical term that relates the phase of the alternating current to the phase of the alternating voltage.I do not think that this really applies well to inverters.Perhaps, you are looking for efficiency.Output power divided by input power all multiplied by 100 will give the percentage of efficiency. It will always be less than 100%.The closer to 100%; the better the efficiency.(Pout/Pin)X 100.Power is the current times the voltage.
What is used to convert distances on the map to actual distances on the ground?
It is the 'scale factor'
What is the effect on the supply current if the capacitor is removed?
It depends on how the capacitor is connected and whether the supply voltage is a.c. or d.c. Assuming you are talking about a power-factor improvement capacitor (connected in parallel with an inductive load, supplied with a.c.), then the supply current will reduce.
Why unity power factor is used in load test?
When power factor is at unity, the voltage and current waves are aligned or in phase with one another. Since power is the product of voltage and current, power transfer is maximized at unity power factor. When power is transmitted at a lower power factor, greater current is required to deliver the same amount of power. When current is increased, the size of the transmission, distribution and generation systems, all have to be increased accordingly, along with the price of the killowatt-hour at the meter.
If we increase the current then what about the power factor?
The power factor depends on the phase angle between the voltage and current on a conductor. The amplitude of the current has no effect on it.
How do you measure the energy that Hydroelectric energy source produces?
The "produced energy" would most likely be transmitted in the form of an electrical current; you can use standard equipment to measure that. If you manage to measure the voltage, the current, and the power factor, you can multiply everything together to get the power; multiply power by time, and you get energy.
In electrical engineering what is form factor?
Form factor of an alternating current waveform (signal) is the ratio of the RMS (Root Mean Square) value to the Absolute Average Value (also referred to as the Practical Average Value) of the waveform.In the case of a sinusoidal wave ie., an analogue wave, the form factor is approximately 1.11.In the case of a square wave ie., a digital wave, the RMS and the average values are equal; therefore, the form factor is 1.
What might be a factor in judging distances accurately for some people?
The time taken to reach a certain destination may be one of the factors used in judging distances accurately for some people. The speed taken to reach a destination is another factor.
What is single phase power factor meter?
Power Factor applies to all A.C.(alternating current) power supplies. It ma not be apparent when a purely resistive load is applied as this offers a PF of 1.0 but any other load type will have a power factor somewhere between 0.0 and 1.0.
What factor determines the amount of current to flow through a circuit?
current
