what is the source of emf waves?

Question Posted / rathi

1 Answers
4474 Views
I also Faced
E-Mail Answers

what is the source of emf waves?..

Answer / guest

The sources of classical electromagnetic waves are
accelerating electric charges. (Note that acceleration
refers to a change in velocity, which occurs whenever a
particle’s speed or its direction of motion changes.) A
common example is the generation of radio waves by
oscillating electric charges in an antenna. When a charge
moves in a linear antenna with an oscillation frequency f,
the oscillatory motion constitutes an acceleration, and an
electromagnetic wave with the same frequency propagates away
from the antenna

Is This Answer Correct ?

8 Yes

0 No

Post New Answer

More Electronics Communications Interview Questions

Q.1. What do you mean by FDMA? Explain in details. Q.2. What are active & passive elements in BTS? Q.3. Name the equipments required for 2+2+2. Q.4. What is the function of BB2F card? Q.5. What is the function of BOI card? Q.6. Which modulation we use in case of GPRS? Q.7. Which slot is reserved for GPRS? Q.8. What is the height of BTS? Q.9. What is the height of ESMA card? Q.10. How many maximum slots we can use in ESMA card? Q.11. We use PSWA card in which case? Q.12. We use PSWB card in which case? Q.13. How many types of Transmission cards are in Ultra BTS? Q.14. How many types of Transmission cards are in Flexi BTS? Q.15. What will happen if we change the polarity of microwave antenna? Q.16. What is the full form of ARFCN? Q.17. What is the function of TRAU? Q.18. Explain the structure of entire GSM. Q.19. Explain the configuration of 4+4+4. Q.20. Which type of connector we use in FIFA card? Q.21. Which type of connector we use at the end of GSM antenna/ Q.22. What are the different types of GSM antenna? Q.23. What do you mean by Splitter? Q.24. Convert the 16 W power into dBm. Q.25. Explain the different steps of Commissioning. Q.26. What do you mean by protection loop? Q.27. What is the correct way of weather proofing? Q.28. Can we use 7GC instead of 15GC? Q.29. What is the function of Duplexer? Q.30. What are the different elements of MSC? Q.31. Write the total description of Ultra Commissioning.

0 Answers Nokia,

What are RC and L/R time constants? What is their significance?

0 Answers

Darlington is used for ??

6 Answers

How to measure the insulation resistance for printed circuit boards?

0 Answers

explain 4 maxwell equations???

1 Answers BEL,

What do u mean by CODEC?

6 Answers TCS,

what is quality factor