Voltage and Current Graph

  • Thread starter Karma
  • Start date
  • #1
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I had to draw a Current vs Voltage graph, and they were both proportional and linear.
i just need help with these questions : what mathematical relationshop (proportionally) does the graph demonstrate between voltage and current?

What do the slopes represent?

pretty easy questions.
 

Answers and Replies

  • #2
1
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V=IxR (ohms law) If you graph I vs V the slope is 1/Resistance
 
  • #3
162
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i know what your talking about, but i cant remember exactly how it goes, but your talking about the 3-d graphs correct?
 
  • #4
1,309
19
the relationship between voltage and current is V = IR, where R is resistance. So R is the proportionality constant. Now, divide by R on both sides to get V/R = I. Now, 1/R if the proportionality constant. 1/R is also known as conductance and is represented by the letter G.

Keep in mind that voltage and and current are only linearly related within a certain voltage range, where this voltage range depends on the circuit element in question. Then weird more complicated relationships occur. The power rating of an element describes this voltage/current range.
 

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