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.

 

[oswaler]

To measure the static resistance of a current/voltage graph, you will need to calculate the slope of the graph at a specific point. This can be done by selecting two points on the graph, one with a known current and another with a known voltage, and using the formula R = V/I to calculate the static resistance. This will give you the resistance value at that specific point on the graph.

To ensure that you are measuring the static resistance and not the dynamic resistance, make sure that the current and voltage values you are using are constant and not changing over time. Dynamic resistance refers to the change in resistance over time, whereas static resistance refers to the resistance at a specific point in time.

Additionally, it is important to note that the resistance of a material may vary depending on factors such as temperature and material composition. Therefore, it is important to control for these variables when measuring the static resistance of a current/voltage graph.

I hope this helps! Let me know if you have any further questions.