Communication Systems In EM waves, polarization Is always vertical in an isotropic medium Results from longitudinal nature of waves Is due to transverse nature of waves Is caused by reflection Is always vertical in an isotropic medium Results from longitudinal nature of waves Is due to transverse nature of waves Is caused by reflection ANSWER DOWNLOAD EXAMIANS APP
Communication Systems Leak type bias is used in plate modulated class C amplifier to Increase the bandwidth Prevent tuned circuit damping Prevent over modulation Prevent excessive grid current Increase the bandwidth Prevent tuned circuit damping Prevent over modulation Prevent excessive grid current ANSWER DOWNLOAD EXAMIANS APP
Communication Systems Which of the following does not cause losses in optical fibre cables? Stepped index operation Attenuation in glass Impurities Microbending Stepped index operation Attenuation in glass Impurities Microbending ANSWER DOWNLOAD EXAMIANS APP
Communication Systems The main function of a balanced modulator is to Produce 100% modulation Limit noise picked by a receiver Produce balanced modulation of a carrier wave Suppress carrier signal in order to create a single-sideband or double sideband Produce 100% modulation Limit noise picked by a receiver Produce balanced modulation of a carrier wave Suppress carrier signal in order to create a single-sideband or double sideband ANSWER DOWNLOAD EXAMIANS APP
Communication Systems Which one of the following is analog? Delta modulation PWM Differential PCM PCM Delta modulation PWM Differential PCM PCM ANSWER DOWNLOAD EXAMIANS APP
Communication Systems One of the advantages of base modulation over collector modulation of a transistor class C amplifier is The lower modulating power requirement Better linearity Improved efficiency High power output per transistor The lower modulating power requirement Better linearity Improved efficiency High power output per transistor ANSWER DOWNLOAD EXAMIANS APP
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