Answer / Dinesh Yadav

The terms forward resistance (Rf), static resistance ( Rs ), and dynamic resistance ( Rd ) are used to describe the behavior of a pn-junction diode under different conditions. Here's an explanation for each:

1. Forward Resistance (Rf): It is the voltage-to-current ratio in the forward-biased condition, measured between the terminals of the diode. In other words, Rf = Vf / If, where Vf is the forward voltage drop and If is the forward current.

2. Static Resistance (Rs): It is the resistance of the diode under reverse bias, measured from anode to cathode. When the diode is reverse-biased, it behaves like an open circuit with infinite resistance. However, in a perfect diode, the static resistance would have a finite value. In practice, most real diodes exhibit a high but non-infinite Rs due to leakage currents.

3. Dynamic Resistance (Rd): It is a more complex parameter that describes the diode's behavior during switching and transient conditions. Rd can be calculated as dVf/dI, where Vf and I are instantaneous values of the forward voltage drop and forward current respectively during the transition from reverse bias to forward bias. Dynamic resistance helps in analyzing the speed at which a diode can switch between forward and reverse bias.

which tap of the transormer you will use in critical condition(worst)?

1 Answers  

---

role of europe union in UK safety legistlation (electrical safety)

1 Answers  

---

in india single phase is 230v and three phase is 440v but in other countries single phase is 110v and three phase is 380v why..?

2 Answers  

---

Why 60Hz frequency is used in America what are all the benifits?

5 Answers  

---

lorteny method

1 Answers  

---

What is the difference between phase, neutral wire and earth cable. if neutral is connected to ground, y we need earthing cable? what difference in hot and cold wire? do neutral wire carry current?

1 Answers  

---

One of the advantages of HRC fuse links is that they can be used to back up equipment with an inadequate rupture rating. briefly discuss what this means

1 Answers  

---

what is difference b/w CFL and Ordinary lamps? which one is useful for power saving?

5 Answers  

---

What is ramp signal?

1 Answers  

---

why in a transformer frequency remains constant? if frequency is changing what will happen?

5 Answers  

---

1.what is the basic difference between surge arrestor and lightning arrestor and where we use it. 1.what is the difference between metal oxide without gapped lightning arrestor and with gapped lightning arrestor

2 Answers  

---

when the size of the cable used for the ht voltage is 300sqmm then what is the size of the conductor of each phase

2 Answers  

---