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Power transmission by AC or DC always uses high currents, but maybe you are questioning why a DC system used very high currents.
Imagine a DC system supplying a few streets at 200 volts, each house draws a current and the total current for the locality is found by adding the currents. Maybe it's 1000 amps. That is the same with AC.
Now suppose several localities are supplied, each drawing 1000 amps. With a DC system the total currents still add up so there might be many thousands of amps to be supplied, needing very thick wire.
But is it's an AC supply, each locality could have its own transformer supplied from a high voltage supply like 11,000 volts. So instead of many thousands of amps, the high-voltage supply might only have to carry 100 amps on relatively thin wire.
The difference between AC and DC is that Transformers cannot be used on DC supplies.
What else can I help you with?
Battery ac or DC?
Batteries can provide both AC (alternating current) or DC (direct current) power, depending on the type of device they are connected to. However, most batteries themselves supply DC power. Devices that require AC power typically use an inverter to convert the battery's DC power into AC power.
How does an ac power source differ from a dc power source?
AC power sources are the adapter power sources. DC power sources are the direct power sources. DC stands for direct current, meaning it is a direct source of energy., and AC stands for alternating current, which means it is a secondary source of power.
What component converts AC into clean DC power?
By using rectification we can convert the AC into DC....
What is the power factor of a DC system?
It would be unity, or 1.0. Since the voltage in a DC circuit does not vary with time, there can be no phase displacement of the current waveform, and therefore the current could not lead or lag the voltage waveform.
Does CPU work on DC current?
A CPU works off of DC voltage. If you monitor the current draw of a CPU, it will likely not be DC, since a modern CPU is a CMOS design, current is only drawn when transistors are switched (ignoring the small leakage current). This is why overclocking (forcing the transistors to switch faster) can cause the CPU to overheat, and why "power save" mode on a laptop sometimes slows down the processor speed.
Why is not impractical to power distribution in power DC?
IN DC FOR LOW VOLTAGE HIGH DENSITY OF CURRENT WILL BE THERE SO WE CAN NOT USE THIS FOR BEST PRACTICE FOR TRANSMISSION & ALSO BECOS OF HIGH CURRENT TRANSMISSION LOSSES ARE VERY HIGH ( I2XR) LOSSES, TRANSMISSIN EQUIPMENT FOR DC ARE HIGH COSTIN DC FOR LOW VOLTAGE HIGH DENSITY OF CURRENT WILL BE THERE SO WE CAN NOT USE THIS FOR BEST PRACTICE FOR TRANSMISSION & ALSO BECOS OF HIGH CURRENT TRANSMISSION LOSSES ARE VERY HIGH ( I2XR) LOSSES, TRANSMISSIN EQUIPMENT FOR DC ARE HIGH COSTAnswerThe main reason is that we cannot use transformers to easily and efficiently change the magnitude of DC voltages, and the ability to change voltages is essential for electricity distribution. However, having said that, very high-voltage transmission over exceptionally long distances is often done using DC. This is because DC losses are far lower than AC losses.
Do you get DC current directly from the transmission line?
Only if it is a DC transmission line.
What is longest High Voltage electric transmission line in the US?
Pacific DC Intertie, a 500KV direct-current power line from The Dalles, Oregon to Los Angeles.
Why do we use AC supply in our homes?
The power transmission would require bigger wires to transmit high dc current so instead high voltage ac current is transmitted through long distance linesTo reduce losses it is necessary for the value of current through lines to be lowTranformers donot work for dc current so one cant step up and step down dc current voltage like it can be done with ac current
What IS AC power and DC power?
AC Power is Alternating Current whereas DC Power is Direct Current.
Why is AC current considered better than DC current in terms of electrical power distribution and transmission?
AC current is considered better than DC current for electrical power distribution and transmission because it can be easily converted to different voltage levels using transformers, allowing for efficient long-distance transmission. Additionally, AC current is able to travel over long distances with minimal power loss, making it more practical for widespread distribution of electricity.
Can you run power windows on a DC current?
Power windows ONLY run on DC current.
What is system of operation?
HVDC system is electric power transmission system to transmit bulk power over long distances with High DC voltage and current. The operation of HVDC system means the transmissing power from generating source to load destinaton.
What is operation of HVDC system?
HVDC system is electric power transmission system to transmit bulk power over long distances with High DC voltage and current. The operation of HVDC system means the transmissing power from generating source to load destinaton.
Battery ac or DC?
Batteries can provide both AC (alternating current) or DC (direct current) power, depending on the type of device they are connected to. However, most batteries themselves supply DC power. Devices that require AC power typically use an inverter to convert the battery's DC power into AC power.
How do you change DC to ac current?
Dc current can be changed to Ac current by using an undulator.Wrong!The devices that change DC to AC are:an electronic power invertera mechanical motor-generator set (only used in very high power stationary applications)an electromechanical vibrator (now obsolete)
Full form of DC power supply?
DC Power is Direct Current Power Supply.
