Measuring Static Resistance of Current/Voltage Graph

[headshrinker]

Hi, how do i measure the statics resistance of a current/voltage graph and not the dynamic resistance?

thanks!

 

[vk6kro]

If you have a straight line graph, they are the same. You just take the voltage at any point and divide it by the current.

If the graph is curved, you can take a small increment in voltage and divide that by a corresponding small change in current. This gives you the dynamic impedance.

At the same point you could just take the absolute value of the voltage and divide it by the absolute value of the current and get the resistance. This is the static resistance.