Communication Systems If output power of a radio receiver is doubled, its volume is increased by __________ dB. -3 1 2 3 -3 1 2 3 ANSWER DOWNLOAD EXAMIANS APP
Communication Systems When the length of antenna is a whole wavelength The radiation is zero in all directions The radiation is maximum in all directions The radiation at right angles is maximum The radiation at right angles is zero The radiation is zero in all directions The radiation is maximum in all directions The radiation at right angles is maximum The radiation at right angles is zero ANSWER DOWNLOAD EXAMIANS APP
Communication Systems For telegraphy the most commonly used modulation system is PCM FSK Single tone modulation Two tone modulation PCM FSK Single tone modulation Two tone modulation ANSWER DOWNLOAD EXAMIANS APP
Communication Systems The colour of an object is decided by None of these The wavelength transmitted through it Reflected colour for opaque object and wavelength transmitted through it for transparent objects The reflected colour None of these The wavelength transmitted through it Reflected colour for opaque object and wavelength transmitted through it for transparent objects The reflected colour 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 10 5 4.9 995 10 5 4.9 ANSWER DOWNLOAD EXAMIANS APP
Communication Systems A telephone channel requires a bandwidth of about 1 kHz 50 kHz 10 kHz 3 kHz 1 kHz 50 kHz 10 kHz 3 kHz ANSWER DOWNLOAD EXAMIANS APP
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