Resistance, Voltage, and current

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Homework Help Overview

The discussion revolves around the concepts of resistance, voltage, and current, particularly in the context of nonlinear components. Participants are examining the implications of resistance definitions and how they relate to different types of resistance in a given problem.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants are exploring the definitions of static and dynamic resistance and questioning how these apply to the problem at hand. There is debate over the correct interpretation of resistance in the context of the question, with some suggesting that the question lacks clarity regarding which type of resistance is being referenced.

Discussion Status

The discussion is ongoing, with participants seeking further clarification on the definitions and implications of resistance types. Some have provided insights into the differences between static and dynamic resistance, while others are still questioning the assumptions made in the problem setup.

Contextual Notes

There appears to be a lack of specificity in the original question regarding whether it refers to static or dynamic resistance, which has led to varied interpretations among participants.

Cici2017

Homework Statement


Screen Shot 2017-07-22 at 4.46.56 pm.png


Homework Equations

The Attempt at a Solution


I chose A, I understand how the resistance is the gradient, but if it is the gradient and the gradient is constant , shouldn't the resistance stay constant? (But the answer is B)
Please help~thanks a lot~
 
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I would have answered D. I can see a case to be made for A, but not for B.
 
Resistance cannot be defined for a nonlinear component.
There is "static resistance" and there is "dynamic resistance" but there is no "resistance".
 
rude man said:
Resistance cannot be defined for a nonlinear component.
There is "static resistance" and there is "dynamic resistance" but there is no "resistance".
Can you please explain a bit more? What does that mean in the context of this question? Thank you!
 
Cici2017 said:
Can you please explain a bit more? What does that mean in the context of this question? Thank you!
It means the question should have specified static or dynamic resistance.
 
Cici2017 said:
Can you please explain a bit more? What does that mean in the context of this question? Thank you!
V/I is the "static" or "chordal" resistance. If that is meant the answer would be D.
dV/dI is the "dynamic" or "differential" resistance. If that is meant the answer would be A if we take the right derivative at V0 but B if we take the left derivative.
In short, silly question.
 
Thank you~
 

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