Question

Which formula gives the forward dynamic (AC) resistance?

Options

• \[r_{fb}=\frac{\Delta I}{\Delta V}\]

• \[r_{fb}=\frac{\Delta V}{\Delta I}\]

• \[r_{fb}=\Delta V\Delta I\]

• \[r_{fb}=\frac{V}{I}\]

Answer 1

Forward dynamic (AC) resistance uses the change in voltage divided by the change in current. Thus, \[r_{fb}=\frac{\Delta V}{\Delta I}\], using two forward-bias values.