Communication Systems questions
74 published questions with worked solutions.
- A bandwidth of 6 MHz is available for A.M. transmission. If the maximum audio signal frequency used for modulating the carrier...Not in JEE or NEET syllabus
- For an amplitude modulated wave the minimum amplitude is 3 V, while the modulation index is 60%. The maximum amplitude of the...Not in JEE or NEET syllabus
- At a particular station, the TV transmission tower has a height of 100 m. To triple its coverage range, height of the tower...Not in JEE or NEET syllabus
- The height of a transmitting antenna at the top of a tower is 25 m and that of receiving antenna is, 49 m. The maximum distance...Not in JEE or NEET syllabus
- A FM broad cast transmitter, using modulating signal of frequency 20 kHz has a deviation ratio of 10. The Banwidth required for...Not in JEE or NEET syllabus
- In the case of amplitude modulation to avoid distortion the modulation index ( ) should be :Not in JEE or NEET syllabus
- Amplitude modulated wave is represented by V_AM = 10[1 + 0.4 (2 10^ 4 t)] (2 10^ 7 t). The total bandwidth of the amplitude...Not in JEE or NEET syllabus
- A modulating signal 2 (6.28 10^ 6 )t is added to the carrier signal 4sin(12.56 10^ 9 )t for amplitude modulation. The combined...Not in JEE or NEET syllabus
- Find the modulation index of an AM wave having 8 V variation where maximum amplitude of the AM wave is 9 V.Not in JEE or NEET syllabus
- The TV transmission tower at a particular station has a height of 125 m. For doubling the coverage of its range, the height of...Not in JEE or NEET syllabus
- A massage signal of frequency 3 kHz is used to modulate a carrier signal of frequency 1.5 MHz. The bandwidth of the amplitude...Not in JEE or NEET syllabus
- A carrier wave of amplitude 15 V is modulated by a sinusoidal base band signal of amplitude 3 V. The ratio of maximum amplitude...Not in JEE or NEET syllabus
- A transmitting antenna is kept on the surface of the earth. The minimum height of receiving antenna required to receive the...Not in JEE or NEET syllabus
- The amplitude of 15 sin(1000 ) is modulated by10 sin(4 ) signal. The amplitude modulated signal contains frequencies of A. 500 Hz...Not in JEE or NEET syllabus
- The height of transmitting antenna is 180 m and the height of the receiving antenna is 245 m. The maximum distance between them...Not in JEE or NEET syllabus
- A message signal of frequency 5 kHz is used to modulate a carrier signal of frequency 2 MHz. The bandwidth for amplitude...Not in JEE or NEET syllabus
- The modulation index for an A.M. wave having maximum and minimum peak-to-peak voltages of 14 mV and 6 mV respectively isNot in JEE or NEET syllabus
- If the height of transmitting and receiving antennas are 80 m each, the maximum line of sight distance will be: Given: Earth's...Not in JEE or NEET syllabus
- Match List I with List II: List-I: (A) Attenuation (B) Transducer (C) Demodulation (D) Repeater List-II: (I) Combination of a...Not in JEE or NEET syllabus
- A sinusoidal carrier voltage is amplitude modulated. The resultant amplitude modulated wave has maximum and minimum amplitude of...Not in JEE or NEET syllabus
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