What are the difference between electrical current and RF?

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SUMMARY

The discussion clarifies the differences between electrical currents, specifically alternating current (AC) and radio frequency (RF). AC is characterized by its alternating nature at a specific frequency, making it suitable for power systems, while RF refers to electromagnetic waves used for communication. The forum participants emphasize that AC is essential for nationwide electrical power distribution, whereas RF operates at much higher frequencies and is utilized in wireless communication technologies. An exception to the AC dominance in power transmission is High Voltage DC (HVDC), which is not the primary focus of this discussion.

PREREQUISITES
  • Understanding of AC and DC electrical currents
  • Basic knowledge of electromagnetic waves
  • Familiarity with electrical power systems
  • Concept of frequency in electrical engineering
NEXT STEPS
  • Research the principles of High Voltage DC (HVDC) transmission
  • Explore the applications of RF in wireless communication technologies
  • Study the differences in frequency ranges between AC and RF
  • Learn about the role of transformers in AC power distribution
USEFUL FOR

Electrical engineers, telecommunications professionals, and students studying electrical engineering concepts will benefit from this discussion.

Ces
Hi. This might be really basic. But I am really struggling to grasp the difference between electrical currents such as AC and DC and RF. For the case of AC current, it alternates currents at a certain frequency.. which makes me wonder how AC and RF are different.

Also, if you could, could you provide an example where we need to use AC instead of DC?

Thanks!
 
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Ces said:
Also, if you could, could you provide an example where we need to use AC instead of DC?
Our entire electrical power system is an example. It is not feasible to generate and transmit DC power in a nationwide huge network. We have to go for AC.
(An exception would be High Voltage DC transmission, but that is a different topic).
 
Hello and welcome to PF.
This question reads very much like a homework type of assignment. That should be posted in the appropriate forum.
But, assuming is isn't, I would ask you what you have found out about this, yourself. What do you know already?
 
Hi Ces
welcome to PF :smile:
Ces said:
which makes me wonder how AC and RF are different.

do you really think they are ?
what have you been reading or told that makes you think so ?

define AC
you already have ...
Ces said:
For the case of AC current, it alternates currents at a certain frequency..

so what did you think an RF current is and why it should be different to your definition that I quoted ?Dave
 
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