Communication Systems When the length of antenna is a whole wavelength The radiation at right angles is maximum The radiation is zero in all directions The radiation at right angles is zero The radiation is maximum in all directions The radiation at right angles is maximum The radiation is zero in all directions The radiation at right angles is zero The radiation is maximum in all directions ANSWER DOWNLOAD EXAMIANS APP
Communication Systems If output power of a radio receiver is doubled, its volume is increased by __________ dB. 1 2 3 -3 1 2 3 -3 ANSWER DOWNLOAD EXAMIANS APP
Communication Systems A three stage telephone switching structure is to have 128 input and 128 output terminals. There are 16 first stage and 16 third stage matrices. To avoid blocking the number of intermediate paths required is 15 1 16 8 15 1 16 8 ANSWER DOWNLOAD EXAMIANS APP
Communication Systems The modulation index of an FM is changed from 0 to 1. How does the transmitted power change? Gets increased by 50 percent Remains unchanged Gets halved Gets doubled Gets increased by 50 percent Remains unchanged Gets halved Gets doubled ANSWER DOWNLOAD EXAMIANS APP
Communication Systems If in a broadcasting studio, a 1000 kHz carrier is modulated by an audio signal of frequency range 100-5000 kHz, the width of channel is __________ kHz. 995 4.9 10 5 995 4.9 10 5 ANSWER DOWNLOAD EXAMIANS APP
Communication Systems Under ordinary circumstances, impulse noise can be reduced in Both AM and FM None of these FM only AM only Both AM and FM None of these FM only AM only ANSWER DOWNLOAD EXAMIANS APP
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