Question

what is a dynamic resistance

Answer 1

The dynamic resistance is theresistance offered by the p-n junction diode when AC voltage is applied. When forward biased voltage is applied to a diode that is connected to AC circuit, an AC or alternating current flows though the diode..

Answer 2

HI FRIEND....

Dynamic resistance of the diode is the resistance for an AC source deppending of the DC polarization of the diode.The DC polarization determines the dynamic resitance, a high diode DC current is a minimun dynamic resitance because the variation in the curve of diode is more high then less resistance.If the AC source is aproximated5mVpp the diode presents a dynamic resistance of Rd=25.9mV/Idwhere25.9mV is a constant and Id y the DC diode current.The AC source should be small to avoid great changes in Id because:Id(Total)=Id(AC)+Id(DC) [superposition principle]Example:with Id=5mA then Rd=25.9mV/5mA=5.18 OhmsId=0.5mA then Rd=25.9mV/0.5mA=51.8 OhmsThe term Dynamic is because the resistance change arround the working zone of the diode.I hope that the information evacuates yours doubts.

..HOPE IT HELPS YOU...