Dynamic Resistance Of A Diode — the NEET Physics formula with its derivation, variables, validity constraints and worked solver.
Dynamic Resistance of a Diode Applicable to the V-I characteristic curve of a semiconductor diode in both forward and reverse bias regions. Start with the V-I characteristic curve of a diode. Identify a point of operation (Q-point) on the curve. Determine the slope of the curve at that point (dI/dV). Define dynamic resistance as the reciprocal of the slope of the tangent at that point. Valid only for small changes (incremental) in voltage and current. Assumes the temperature of the diode remains constant. Confusing dynamic resistance (delta V / delta I) with static resistance (V / I). Assuming dynamic resistance is constant; it varies depending on the operating point on the non-linear curve.