Communication Systems The characteristic impedance of a twin wire feeder used for TV signals is about 1000 ohm 100 ohm 300 ohm 500 ohm 1000 ohm 100 ohm 300 ohm 500 ohm ANSWER DOWNLOAD EXAMIANS APP
Communication Systems In EM waves, polarization Is always vertical in an isotropic medium Results from longitudinal nature of waves Is caused by reflection Is due to transverse nature of waves Is always vertical in an isotropic medium Results from longitudinal nature of waves Is caused by reflection Is due to transverse nature of waves ANSWER DOWNLOAD EXAMIANS APP
Communication Systems Which of the following does not cause losses in optical fibre cables? Impurities Stepped index operation Attenuation in glass Microbending Impurities Stepped index operation Attenuation in glass Microbending ANSWER DOWNLOAD EXAMIANS APP
Communication Systems For a low level AM system, the amplifiers modulated stage must be Harmonic devices Linear devices Non-linear devices Class C amplifiers Harmonic devices Linear devices Non-linear devices Class C amplifiers ANSWER DOWNLOAD EXAMIANS APP
Communication Systems A cordless telephone using separate frequencies for transmission in base and portable units is known as Neither A nor B Either A or B Duplex arrangement Half duplex arrangement Neither A nor B Either A or B Duplex arrangement Half duplex arrangement ANSWER DOWNLOAD EXAMIANS APP
Communication Systems A telephone channel requires a bandwidth of about 1 kHz 3 kHz 10 kHz 50 kHz 1 kHz 3 kHz 10 kHz 50 kHz ANSWER DOWNLOAD EXAMIANS APP
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