What is the Correct Definition of Dynamic Resistance and Resistivity?

This definition is similar to the one for normal resistivity, ρ = E/J.In summary, dynamic resistance is often referred to as dV/dI and is commonly used to describe the dynamic forward resistance of a diode or zener diode junction. For dynamic resistivity, a possible definition is ρD = dE/dJ, where E is electric field and J is current density. This definition is similar to the one for normal resistivity, ρ = E/J.
  • #1
tiny-tim
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I'm confused about dynamic resistance.

The definition I've seen is Rd = dV/dI.

Is it also ok to write it Rd = d(IR)/dI, so that Rd = R + I dR/dI ?

I couldn't find a straightforward definition for dynamic resistivity at all …

is it ρd = d(Iρ)dI = ρ + I dρ/dI ?
 
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  • #2
Dynamic resistance is dV / dI. It is often used to refer to the dynamic forward resistance of a diode junction, or the dynamic resistance of a zener diode junction.
 
  • #4
If RD = dV/dI, then a reasonable definition for dynamic resistivity would be
ρD = dE/dJ,​

where E is electric field and J is the current density.
 

FAQ: What is the Correct Definition of Dynamic Resistance and Resistivity?

What is dynamic resistance confusion?

Dynamic resistance confusion refers to the phenomenon in which an electrical circuit experiences varying levels of resistance over time due to changes in voltage or current.

What causes dynamic resistance confusion?

Dynamic resistance confusion can be caused by a variety of factors, including changes in temperature, fluctuations in power supply, and the presence of reactive components in the circuit.

How does dynamic resistance confusion affect circuit performance?

Dynamic resistance confusion can lead to fluctuations in circuit performance, as the varying resistance can impact the flow of current and voltage within the circuit. This can ultimately result in errors or malfunctions in the system.

Can dynamic resistance confusion be prevented?

While it may not be possible to completely prevent dynamic resistance confusion, it can be mitigated through proper circuit design and the use of components that are less susceptible to changes in resistance.

How is dynamic resistance confusion measured?

Dynamic resistance confusion can be measured using specialized instruments such as oscilloscopes or multimeters, which can detect changes in resistance over time and provide data on the extent of the confusion within a circuit.

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