Thx
Does it? I think Ohm's law states that I is proportional to V, that is V/I equals a constant. I hope R = V/I in this case as well
If so, what is the meaning of the inverse of the slope? It has the resistance's unit as well. Or it is the resistance? Then, what is V/I?
Thx ag
The resistance of anything is R=V/I and the reistance of the filament at a given point is the slope? Don't they seem to be contradictory? Because the inverse of the slope doen't equal to V/l anyway. Can you tell me why? thanks :confused:
Thx
I agree. But the filament of the bulb doesn't obey ohm's law, i.e. the relationship (rs) is not linear. It is a coincidence that the slope equals to the quotient of any coordinates on the I-V graph when the rs is linear and the line passes through the origin.
So, in the particular case...
I've just done the experiment on investigating the resistance of a piece of filament. As expected, the dots on the I-V graph shows a curve trend. But what is the resistance of each point on the curve? the 1/slope? or just the x coordinate/y coordinate? What's the difference? Thanks. :smile: