Answer / anil

cut in voltage of LED is higher bcoz LEDs are made up of
GaAs or GaAsP which has more threshold voltage.....

LEds are not used in rectifiers bcoz firstly they have more
cut in voltage so it creates a problem while rectifying low
voltages....and
secondly the PIV rating of LED is less than a typical Si
diode....so LED can get damaged during the negative portion
of the AC voltage....

Answer / raikwar rajesh kumar

The cut in voltage f LED is higher then diode because the
LED are a very important use of diodes in that they are the
most commonly used indicators.
All diodes emit radiation when a electron meets a
hole and falls into a lower energy state. The released
photon is dependant on the band gap. So, for particular
band gaps this released enery is chromatic.

what is the role of electronics,communication engg. in IT industry?

0 Answers   Wipro,

---

What is interfacing?

0 Answers  

---

pls send my id for supervisor model paper qustion

0 Answers   Bhel,

---

what r ur strengths?

10 Answers   HCL, Wipro,

---

How can you convert an JK Flip-flop to a D Flip-flop?

13 Answers   Bhel, Chenega, Electronics, NTRO, RVS, TCS,

---

what is meant by 8.0.4 in TEMS 8.0.4?

0 Answers  

---

What is conductor?

0 Answers  

---

What is avalance breakdown?

0 Answers  

---

what is the bandwidth of ideal operational amplifier?

4 Answers   TCS,

---

IN WCDMA(WIDE CODE DIVISION MULTIPLE ACCESS)WHICH ONE FREQUENCY HOPPING IS USED EITHER FAST FREQUENCY OR SLOW FREQUENCY HOPPING,SAY IN DETAILS

0 Answers   Idea, TCS,

---

What is the function of BTS.

14 Answers   MTN Nigeria, NSN, ZTE,

---

Define what happens to the series current , load current and zener current when the dc input voltage of a zener regulator increases?

0 Answers  

---