When does a larger voltage result in a greater current?

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Homework Help Overview

The discussion revolves around the relationship between voltage, current, and resistance in the context of induced current in a circuit, particularly focusing on the conditions under which current is maximized in relation to changing magnetic flux.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants explore the apparent contradiction between the principle of induced current and Ohm's law (V = IR), questioning how an increase in voltage affects current when resistance is constant.

Discussion Status

There is an active exploration of the relationship between voltage and current, with some participants expressing confusion and others providing clarifications regarding the direct proportionality of current to voltage under constant resistance. The discussion is ongoing with no explicit consensus reached.

Contextual Notes

Participants are grappling with the implications of Ohm's law in the context of changing magnetic fields and induced currents, indicating a potential misunderstanding of the foundational concepts involved.

Mycelium
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Homework Statement



I was looking at a question which asked when the induced current in a circuit was greatest, and this was when the rate of change of magnetic flux was greatest. However, this (seems to )contradicts V = IR. Can anyone explain?

Homework Equations

The Attempt at a Solution

 
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Mycelium said:
this (seems to )contradicts V = IR.
How?
 
cnh1995 said:
How?
I thought that if we have constant resistance, an increase in voltage would lead to a decrease in current. At least that's how I interpret the equation.
 
Mycelium said:
increase in voltage would lead to a decrease in current.
R=V/I. Increase in voltage increases the current such that V/I is constant. I is in direct proportion with V. That's pretty intuitive, isn't it?
 
cnh1995 said:
R=V/I. Increase in voltage increases the current such that V/I is constant. I is in direct proportion with V. That's pretty intuitive, isn't it?
Yeah, it makes sense thinking about it like that. Thanks [emoji4]
 

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