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News announcements and other topics => News => Topic started by: Magnethos on October 08, 2008, 02:42:48 PM

Title: Help with Voltage/Current conversion?
Post by: Magnethos on October 08, 2008, 02:42:48 PM
Hi my friends
Think that I have a power source of 9Volts 1 Ampere, I know that I can increase the voltage if I decrease the amperage.
And I think also that you can increase the amperage if you decrease the voltage.

MY QUESTION IS There is a ratio between the voltage and amperage? I mean, if I increase the voltage x3 times... the current decrease x3 times also? There is any conversion ratio or the result is unknow?

If you have a doubt about my question and you want that I explain it better, let me know.
Title: Re: Help with Voltage/Current conversion?
Post by: Xaverius on October 08, 2008, 07:19:18 PM
Quote from: Magnethos on October 08, 2008, 02:42:48 PM
Hi my friends
Think that I have a power source of 9Volts 1 Ampere, I know that I can increase the voltage if I decrease the amperage.
And I think also that you can increase the amperage if you decrease the voltage.

MY QUESTION IS There is a ratio between the voltage and amperage? I mean, if I increase the voltage x3 times... the current decrease x3 times also? There is any conversion ratio or the result is unknow?

If you have a doubt about my question and you want that I explain it better, let me know.

Hi, if you are using a transformer, then your numbers are correct, increase voltage 3 times, reduce current 3 times, decrease voltage 3 times, increase current 3 times. Yes.
Title: Re: Help with Voltage/Current conversion?
Post by: Magnethos on October 08, 2008, 07:22:35 PM
Very interesting...

P.S. Thank Xaverious
Title: Re: Help with Voltage/Current conversion?
Post by: BEP on October 08, 2008, 08:53:17 PM
@Magnethos

You are basically correct but only if you are trying to maintain the same power in the circuit and it is direct current.

I suggest you do a Wiki on 'Ohm's Law' and play with how it works with D.C. circuits first. After all, it is just plumbing.

Volts          = pressure
Amps         = amount of flow
Resistance = restriction

Stay away from A.C. circuits until you have a good grasp on D.C. circuits with Ohm's Law  ;)
Title: Re: Help with Voltage/Current conversion?
Post by: sparks on October 08, 2008, 10:18:18 PM
@Bep

  Pressure / volts
  Volume / amps
  Friction/ resistance
  Velocity/   ?????
Title: Re: Help with Voltage/Current conversion?
Post by: BEP on October 08, 2008, 10:54:52 PM
@Sparks,

As it is, Ohm's law is a good approximation ;)

That is one of the reasons for 'fudge factors'.

Let us not start another superluminal discussion ;D