The dynamic resistance of a diode, be it zener or otherwise, will be different from its static resistance because a diode is not a resistor, and resistance is not a function of current flow. It is a diode, and a diode has its own characteristic voltage to current curve, forward and, in the case of a zener, reverse.
B - Dynamic resistance
static resistance: This is measured when diode id forward biased and input is a D.C signal. The ratio of voltage applied to the current flowing through diode gives static resistance Dynamic resistance : this is measured when input is A.C signal. since A.C signal varies continuously the resistance offered also changes continuously. the ratio of change in voltage to change in current gives dynamic resistance.
The Current-Voltage relationship of a diode is not constant (not a straight line) and hence the resistance cannot be measured. Due to this non-linear nature of the the curve, there exists a unique value of resistance at every point of the curve which is called dynamic resistance (not static of constant resistance). The dynamic resistance equals the change in voltage divided by the change in current, when the voltage is changed by a small amount. In other words it is the slope of the graph of voltage against current. The dynamic resistance is different at different current values. About 30 years ago, and I do not remeber the brand or maker, there was a digital multimeter that DID measure dynamic resistance in diodes. It was a God Send for testing diodes in circuit. Diodes only conduct in one direction, so the device would show an open in one direction and a resistance under 1000 ohms on the other or a short (0 ohms).
zener resistance of a zener diode is the resistance of the zener diode but which is the resistance of a diode
After isolating the diode from the circuit, the diode shows infinite resistance in one direction and low resistance in the other direction. The diode
The static resistance which is calculated from the static ch. of doide is the dc resistance offered by the diode. dynamic ch. of the diode describes the diode's behavior when the applied voltage is fluctuating,or ac, thus the dynamic resistace is simply the ac resistance offered by the diode.akhil gopalpunnapra
B - Dynamic resistance
actually we can measure the static and dynamic resistance in dc supply mode . static resistence vf/if dynamic resistance vf1-vf2/if1-if2 elumalai.r
static resistance: This is measured when diode id forward biased and input is a D.C signal. The ratio of voltage applied to the current flowing through diode gives static resistance Dynamic resistance : this is measured when input is A.C signal. since A.C signal varies continuously the resistance offered also changes continuously. the ratio of change in voltage to change in current gives dynamic resistance.
The Current-Voltage relationship of a diode is not constant (not a straight line) and hence the resistance cannot be measured. Due to this non-linear nature of the the curve, there exists a unique value of resistance at every point of the curve which is called dynamic resistance (not static of constant resistance). The dynamic resistance equals the change in voltage divided by the change in current, when the voltage is changed by a small amount. In other words it is the slope of the graph of voltage against current. The dynamic resistance is different at different current values. About 30 years ago, and I do not remeber the brand or maker, there was a digital multimeter that DID measure dynamic resistance in diodes. It was a God Send for testing diodes in circuit. Diodes only conduct in one direction, so the device would show an open in one direction and a resistance under 1000 ohms on the other or a short (0 ohms).
Dynamic element term is arises on the domain of digital to analog conversion in the field of electronics. if you are looking for dynamic microphone it means this converter applied sound vivration to electrical signal. Dynamic term also arise in the field of diode static and dynamic resistance.
zener resistance of a zener diode is the resistance of the zener diode but which is the resistance of a diode
Bulk resistance of diode depends on how it is biased. The bulk resistance of a diode is the approximate resistance of the diode when it is forward biased.
After isolating the diode from the circuit, the diode shows infinite resistance in one direction and low resistance in the other direction. The diode
the path of least Resistance electricity is like water it flows in the direction of least Resistance so current should flow in the diode with the lowest Resistance but if the draw on current was high enough it would also start to flow in the higher resistance diode
no we not use resistance in place of diode.
Rd= Vt*c/I Vt=KT/q, K=Boltzmann constant C= constant 2 for si 1 for Ge I current through the diode