# Why AC current is used for long distance transmission?

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## Why is AC current better for long distances?

It comes down to : AC was easier to generate and easier to get to high voltages using transformers. You could then transmit the same amount of power at higher voltages and lower currents.

## Why is AC good for transmission?

The use of AC makes the transmission of electrical power to great distances much more economical. Suppose we need to transmit power W (watts, or more likely megawatts, millions of watts) from the power station where it is produced (by steam turbines or water turbines) to distant users.

## Why is DC better for long distances?

Another advantage of DC is that it doesn’t require synchronization between grids. Two AC grids need to be phase-synced to be connected together. This gets tricky when the distances are large enough to be significant fractions of a cycle. The flip side is that AC is easier to convert between voltages.

## Why DC current is not used in homes?

Direct current is not used at home because for the same value of the voltage, DC is more lethal than AC since direct current does not go through zero. Electrolytic corrosion is more an issue with direct current.

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## Why do we prefer AC over DC?

Hence, the voltage through transmission lines is very high, which reduces the current, which in turn minimizes the energy lost through transmission. This is why alternating current is preferred over direct current for transmitting electricity, as it is much cheaper to change the voltage of an alternating current.

## What are the advantages and disadvantages of DC transmission over AC transmission?

1) There is no inductance, capacitance, phase displacement and surge problem in DC transmission. 2) Due to the absence of inductance, the voltage drop in DC transmission is less than the AC transmission for the same load and receiving end voltage. Because of this DC transmission has better voltage regulation.

## Is AC safer than DC?

A.C. is said to be four to five times more dangerous than D.C. For one thing, A.C. causes more severe muscular contractions. … The frequency of the AC has a lot to do with the effect on the human body. Unfortunately, 60 cycles is in the most harmful range. At this frequency, as little as 25 volts can kill.

## Why is AC transmission more popular than DC transmission?

The AC transmission line uses three conductors for long power transmission. And the DC transmission line uses two conductors for power transmission. … Hence, DC requires the less insulation as compared to AC. The communication line interference is more in the AC transmission line as compared to the DC transmission line.

## Which is more efficient AC or DC?

1. DC power is significantly more energy efficient than AC power. DC motors and appliances have higher efficiency and power to size characteristics. … The greater efficiency resulting from recent developments in DC converter technology allows improvements in electricity delivery over long distances.

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## Why cables are not used for long distance transmission?

Long-distance, electric-power, transmission lines always operate at very high voltage, sometimes as much as 750 kV. … To deal with this, the insulation for the high voltage cable needs to be very specialized and is prone to breaking down due to the voltage tunneling its way through the insulation.

## Why DC is not used in transmission?

DC(Direct Current) is not used over AC(Alternating Current) in transmission because DC goes heavy attenuation while transmission over long distance as we do not transform it from Low Voltage (at which it is being generated) to High voltage (for transmission over long distance(I will explain…)) by some direct mean …

## Why AC is cheaper than DC?

Now the choice for AC or DC will depend on the cost of equipment needed to increase and decrease voltage level. As the transformer and related equipment for AC are cheaper compared to boosters and converters for DC, AC supply system is less expensive and accepted world wide.