Answer Posted / abhishek jain

modulation is scheme under which the the signal is first
modified to suitable form(compress or amplied)and mixwd
with the carrier for trassmission
BASIC NEED FOR MODULATION IS:
1.TO REDUCE ANTENNA HEIGHT
2.TRANSMIT THE INFORMATION TO MORE DISTANCE WITH OUT
INTERFERENCE
3.TO REDUCE BAND WIDTH
EX:SUPPOSE IF U WANT THROUGH A PAPER HAVING INFORMATION TO
YOUR OPP APPARTMENT FROM YOUR APPARTMENT(EX:D=500cm)IF U
SIMPLY THROUGH A PAPER IT WILL NEVER REACH TO THE OPP
APPARTMENT BUT IF YOU USE A STONE.i.e COMBINELY WE CAN
THROUGH BECAUSE STONE HAVE WEIGHT LIKE WISE CARRIER HAVE
MORE POWER THAN BASE SIGNAL THAN WE CAN TRANSMITE THE
SIGNAL.

What is a bistable multivibrator?

1055

---

The magnitude of electrostatic force between two identical positive ions that are separated by a distance of 5.0 x 10– 10 m is 3.7 x 10–9 N. (a) What is the charge of each ion? (b) How many electrons are “missing” from each ion?

2094

---

any one have C-Dot interview question.....its urgent ...if any one hav..plzz share as soon as possible.

2885

---

wbsedcl job in kolkata

2120

---

Explain find conductivity, resistivity and resistance?

943

---

What is meant by step-down cyclo-converters?

1084

---

What is meant by CDOT in relation to the Communication in BSNL? Explain the term CDOT.

2566

---

What is am.

1057

---

What are minterm and maxterm?

1219

---

What's the difference between looping 0s and 1s in K map?

5116

---

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

3190

---

74Ls244 is _____?

984

---

What the types of breaking systems in circuit breakers? Why we use CT with fuse in series trip circuit breaker(HT), though we don't use fuse normally in CT output?

2294

---

On what parameters does the free running frequency of vco depend on?

1259

---

What do you understand by voltmeter multiplier?

1088

---