Decreaseing voltage increases current

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Discussion Overview

The discussion centers around the relationship between voltage and current, particularly in the context of electrical circuits. Participants explore the conditions under which current may increase or decrease with changes in voltage and resistance, addressing both theoretical and practical aspects.

Discussion Character

  • Technical explanation
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant questions why increasing voltage does not always lead to an increase in current, suggesting confusion around the relationship.
  • Another participant states that, generally, an increase in voltage results in an increase in current, referencing Ohm's Law (V = I * R).
  • A participant provides an example involving power and resistance, noting that while voltage may remain constant, current can increase with changes in load.
  • It is mentioned that in AC circuits, changes in current can lead or lag changes in voltage, which may contribute to the confusion regarding their relationship.
  • Participants discuss the role of resistance, indicating that increasing resistance while holding voltage constant would decrease current.

Areas of Agreement / Disagreement

Participants express differing views on the relationship between voltage and current, with some asserting a direct proportionality under certain conditions, while others highlight exceptions or specific scenarios that complicate this relationship. The discussion remains unresolved regarding the nuances of these interactions.

Contextual Notes

Limitations include potential misunderstandings of AC circuit behavior, the impact of resistance on current, and the specific conditions under which voltage and current interact.

loadedmike
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hey fellas,

ok...so here's me question.

with increasing voltage i should increase current?

why does it work to the opposite...

even a small begginers lecture would be much appreciated
 
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Unless you're talking about a Gunn diode or some other relatively esoteric device, an increase in voltage is seen with an increase in current.

Volts = Current * resistance, so voltage is proportional to current with a coefficient of resistance.

Ex: We have 5 volts going through a resistance of 0.5 ohms, what will the current be?

5 = I * 0.5

5/0.5 = 10, so 10 amps.

Double the voltage and see what you get.
 
loadedmike said:
why does it work to the opposite...

What circumstance are you referring too?
 
lets say you have 500 watts at an 8ohm load...it works out to roughly 63volts rms...

lets say you change that load to 1500 watts with a ohm load of 2.67 still the same voltage but obviously with an increse in current...but the same voltage...

but the confusing thing to me is if you do increase the voltage then you in fact increase current...that fact has been pointed out to me..(thanks by the way!)but all the research I've done always says voltage drop increases current...why
 
loadedmike said:
but all the research I've done always says voltage drop increases current...why

A decrease in voltage decreases current if all other factors remain constant.

In an AC circuit a change in current can lead or lag a change in voltage. Could that be what is confusing you.
 
what other factors would those be?
 
In this case resistance.
 
...so would increasing resistance decreases current...if voltage is held constant?
 
Exactly, I = V/R, current is directly proportional to voltage and inversely proportional to resistance.
 
  • #10
awesme thanks guys!
 
  • #11
Let me guess, another car audio guy is set straight...
 

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