| Electronics > Beginners |
| relationship between V, I and R in graphical terms |
| (1/5) > >> |
| brownt:
I can't make sense of this graph I understand the in written terms as in proportionality and the inverse. But I can't see how the graph relates. Can someone explain it please. |
| agehall:
U=R*I If U is constant, you get something like above. If R is high, I needs to be lower and vice versa. |
| IanB:
The graph is incorrect in showing a linear relationship. Therefore it cannot be explained. |
| Nitrousoxide:
Usually, you will have Voltage on the x-axis (dependent variable) and current on the Y axis (independent variable) and R is the "controlled variable". But this does depend on device/experimental setup So you will have: V = I*R R = V/I (can be seen as dV/dI or gradient). Alternatively you can switch the axies, that case the gradient will be 1/R. |
| brownt:
I see. well that's good. What about these graphs then. I think the first one makes sense, but the other one does not? |
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