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The need for more and more power. In a fixed voltage system like DC, power is proportional to current, and current is related to conductor size. In order to have more power, you had to have larger conductors, and it was becoming unwieldy.
With AC, we could use Transformers to step up the voltage. Power is now proportional to both current and voltage, but current is still only related to conductor size, which means that with higher voltage, you could transfer more power with smaller conductors. Transformers would step up the voltage at the substation for transmission and distribution, while transformers on the poles would step it back down for small groups of services.
What else can I help you with?
Does microwave change AC to DC?
A: Microwaves are AC frequency in the very high spectrum. And no they do not change AC to DC
How ac change to DC?
by the use of inverter we can convert ac to dc.
How do you make ac into DC in a ac transformer?
You can not change AC into DC using a transformer. A transformer changes the voltage levels. To change AC into DC, you would need a rectifier. To change that into smooth DC you need a capaciter and a voltage regulater
How do you change over a ac motor to a dc generator?
Type your answer here... how can you change an ac motor to a dc generator
What important system consisting of diodes in converting ac to dc?
Halfwave or fullwave or polyphase AC to DC?
What is the difference between rectifier and converter?
A rectifier converts AC voltage into DC voltage. A converter is something more general. It describes not only rectifiers, but also devices that can turn DC into AC or perform DC-to-DC or AC-to-AC conversion.
Why isn't there a DC transfromer?
An AC transformer works by changing the magnetic field going through a coil. The change is unavailable in the case of DC. It is possible to convert DC to AC (with an inverter) and then change the AC voltage to another value and rectify it to get DC at a different voltage.
Does a pulsating DC contains ac components?
A: As a DC source change state rapidly this variation is consider an AC component
What is main difference between ac power and dc power?
AC power is made by alternating current and DC does not change.
What is the device used to change dc to ac?
Inverter
What can change AC current into DC current?
Rectifier
What can change an ac current to a DC current?
rectifierac motor - dc generator set
