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Transmission lines use alternating current in order to support stepping-up and stepping-down of the voltage with Transformers. Voltage is stepped-up at the power station, sent over the transmission lines, and stepped-down at the receiver. (This is a simplified explanation.) By stepping-up, you reduce the current carrying requirement of the lines, and they can thus be smaller.
You could not do this with direct current as transformers only work for alternating current.
Wiki User
∙ 12y ago
Wiki User
∙ 13y agoBecause you can transfer high power without the cost of large conductors that would be needed if you transferred high current.
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What does a transmission system at a radio station use to convert a direct current into a high frequency alternating current?
a high power, often class C amplifier.
Can you use the compass under the power lines?
If the power lines were Direct Current, sometimes used for efficient long distance transmission, then your compass would definitely be affected, and may be quite useless. The high currents in such a long distance DC line will generate a magnetic field. With an Alternating Current power line, the alternating current itself should not cause any problem with the compass, but the steel of the towers themselves may certainly do so.
What is use of rectifier?
Rectifier is used to convert alternating current to direct current.
What kind of energy source does a transformer use?
Electrical (alternating current)
Can current flow both ways through a lamp?
Yes, we use AC (alternating current) in our homes, the current changes direction 120 times a second.
Why you use ac current of home instead of dc?
alternating current is generally instantaneous in nature and even in transmission lines it is easy to transmit with less losses when compared to dc as because it possess frequency where as dc do not have
What are the advantages of generating alternating Voltage for transmission?
The main advantage is that it's very easy to step alternating current up or down in voltage by the use of a transformer. High voltage is preferred for long distance transmission because it cuts transmission loss.
What does a transmission system at a radio station use to convert a direct current into a high frequency alternating current?
a high power, often class C amplifier.
Wall outlets use what kind of current?
alternating current
Can you use the compass under the power lines?
If the power lines were Direct Current, sometimes used for efficient long distance transmission, then your compass would definitely be affected, and may be quite useless. The high currents in such a long distance DC line will generate a magnetic field. With an Alternating Current power line, the alternating current itself should not cause any problem with the compass, but the steel of the towers themselves may certainly do so.
What is use of rectifier?
Rectifier is used to convert alternating current to direct current.
Do you use static electricity in your homes or current electricity?
electric current (alternating)
Do strobe lights use ac or dc current to flash?
Strobe lights use ac or alternating current to flash. The frequency of 50 Hz is alternating current's frequency, coming in handy for its flashing.
What is use of capacitor?
It blocks direct electrical current allowing alternating current to pass
Is current transformer is a distribution transformer?
In transmission lines there is a massive current, we use CT to make this current measurable i.e. it steps down the current but DT is used to step down the voltage
What is an a c adapter?
An AC Adapter converts direct current into alternating current. It is handy when you only have 12 volt battery current and you need to use power tools which only run on alternating current.
Do most households use direct current true or false?
False, most houses use alternating current.
