Question

What is dynamic resistance?

Options

• The ratio of voltage to current at any operating point of a diode

• The ratio of drift current to diffusion current at equilibrium

• The potential difference developed across the depletion layer due to immobile ions

• The ratio of a small change in voltage to the corresponding small change in current

Answer 1

Dynamic resistance relates a small voltage change to the corresponding current change. It is given by \[r_{d}=\frac{\Delta V}{\Delta I}\].