Answer / azhar anjum

IGBTs are Insulated Gate Bipolar Junction Transistors. It
is combination of MOSFET & BJT. They have high current and
voltage ratings. They are used in electric motor drives
etc.

Answer / sujit

it is a switching device that is used to switching the time on delay and time on off ex concept of refreezenerater concept as energy saving concept

What do you mean by 3 dB cutoff frequency? Why is it 3 dB, not 1 dB?

16 Answers   College School Exams Tests, Infosys, Persistent, TCS, Wipro,

---

what is race aroun condititon in flip flop

3 Answers  

---

where we use zenor diode

3 Answers   HCL,

---

Why the singnal of wireless/Tv in db value? and why it is showing in minus(-)?

4 Answers   BSNL, Wipro,

---

In the case of baseband signaling, the received waveforms are already in a pulse-like form. Why then, is a demodulator (receiving filter) needed to recover the pulse waveform?

0 Answers  

---

---

difference between ac and dc

10 Answers   Alstom, BPL, Ford, HCL, Wipro,

---

Any idea of BSNL, JTO paper?

0 Answers   BSNL,

---

What is SCADA ? What are its main components ? How it works ? When we need a SCADA & where ? Is there any similarities and comparison b/w PLC & SCADA ? What are its Pros & Cons ? What are the faults that occur in it most ?

2 Answers  

---

What is meant by the temperature coefficient?

0 Answers  

---

Why opamp called direct coupled high differential circuit?

0 Answers  

---

write a program that changes 74H to 47H in 8085 assembly programming

0 Answers  

---

what is the uses of VSB?

2 Answers  

---