Which modulation is good for Radio Broadcasting. AM(Amplitude Modulation) or FM(Frequency Modulation)?

7 Answers   TCS, Vodafone,

---

Explain how to increase the gain and directivity of an antenna?

0 Answers  

---

3 girls are wearing 3 different colored outfits red,white,black.Each outfit involves dress of that color,matching socks&shoes.The girls decide to exchange their shoes such that each girl ends up with ! hoe each from the other two girls How many legs will u've to look at,to exactly know color of shoes on right&left leg of each girl?

2 Answers  

---

What is D-FF? What is the basic difference between Latches and Flip flops? What is a multiplexer? How can you convert an SR Flip-flop to a JK Flip-flop? How can you convert an JK Flip-flop to a D Flip-flop? What is Race-around problem? How can you rectify it? Which semiconductor device is used as a voltage regulator and why? Explain an ideal voltage source? Explain zener breakdown and avalanche breakdown? What are the different types of filters? What is the need of filtering ideal response of filters and actual response of filters? What is sampling theorem? What is impulse response? Explain the advantages and disadvantages of FIR filters compared to IIR counterparts. What is CMRR? Explain half-duplex and full-duplex communication? Which range of signals is used for terrestrial transmission? Why is there need for modulation? Which type of modulation is used in TV transmission? Why we use vestigial side band (VSB-C3F) transmission for picture? When transmitting digital signals is it necessary to transmit some harmonics in addition to fundamental frequency? For asynchronous transmission, is it necessary to supply some synchronizing pulses additionally or to supply or to supply start and stop bit? BPFSK is more efficient than BFSK in presence of noise. Why? What is meant by pre-emphasis and de-emphasis? Explain 3 dB cutoff frequency? Why is it 3 dB, not 1 dB? Explain ASCII, EBCDIC?

3 Answers   DRDO, Electronics,

---

why the crystal frequency of 8051 is divide by 12 for its working?

4 Answers  

---

Explain the construction and pros of using plasma screens.

0 Answers  

---

What is the function of BB2F card?

0 Answers   NSN,

---

what its mean 'inverter based technology' ? if we talk about refrigerators, splits ACs etc how it helps to produce & keep more coolness and chilled atmosphere ?

0 Answers   TCS,

---

Why are using 4ma to 20ma for signal transfer. Why not 0 to 20ma?

0 Answers  

---

Derive intrinsic stand off ratio.

0 Answers  

---

What are the disadvantages of the harmonics present in the inverter system?

0 Answers  

---

Define what is meant by fermi level in semiconductor? Where does the fermi level lie in an intrinsic semiconductor?

0 Answers  

---