Question 1. If C is capacity of noisy channel, (bits/s), δf is bandwidth Hz and S/N is signal to noise ratio, then

Question 2. In the figure m(t) = 2 Sin2πt / t, s(t) = cos200πt, n(t) = sin199πt / t, the output y(t) will be

Question 3. If k is dielectric constant of a medium, the velocity factor in that medium is

Question 4. The trapezoidal pattern of figure is obtained when examining an AM wave by an oscilloscope. Modulation factor of the wave is

Question 5. In the following equation of M-ary PSK signal (where Ey is symbol energy), M becomes large. Then d will approach

Question 6. Consider the following statements as regards DPSK and DEPSK
1. DPSK demodulator requires a device which operates at carrier frequency and provides a delay of bit time Tb
2. In DPSK, synchronous demodulation recovers the signal b(t) and the decoding of b(t) to generate d(t) is done at base band
3. In both DPSK and DEPSK errors always occur in pairs
Which of the above statements are correct?

Question 7. Pre-emphasis circuit is used

Question 8. In commercial FM Broadcasting, A radio station transmitting the signal at 98.3 MHz, it is

Question 9. In which frequency range is the noise figure in a transistor minimum

Question 10. An audio frequency of 5 kHz is translated to a radio frequency carrier of frequency 1 MHz and transmitted it to space through an antenna. The required height of antenna is