Communication Systems If output power of a radio receiver is doubled, its volume is increased by __________ dB. 3 2 1 -3 3 2 1 -3 ANSWER DOWNLOAD EXAMIANS APP
Communication Systems The modulation index of an FM is changed from 0 to 1. How does the transmitted power change? Remains unchanged Gets doubled Gets increased by 50 percent Gets halved Remains unchanged Gets doubled Gets increased by 50 percent Gets halved ANSWER DOWNLOAD EXAMIANS APP
Communication Systems As per Shannon-Hartley theorem, a noise less Gaussian channel has None of these Infinite capacity Small capacity Zero capacity None of these Infinite capacity Small capacity Zero capacity ANSWER DOWNLOAD EXAMIANS APP
Communication Systems Leak type bias is used in plate modulated class C amplifier to Increase the bandwidth Prevent over modulation Prevent tuned circuit damping Prevent excessive grid current Increase the bandwidth Prevent over modulation Prevent tuned circuit damping Prevent excessive grid current ANSWER DOWNLOAD EXAMIANS APP
Communication Systems In Modulation, “carrier” is Voltage with constant frequency, phase or amplitude Speech voltage to be transmitted Resultant wave Voltage for which frequency, phase or amplitude is varied Voltage with constant frequency, phase or amplitude Speech voltage to be transmitted Resultant wave Voltage for which frequency, phase or amplitude is varied ANSWER DOWNLOAD EXAMIANS APP
Communication Systems Full duplex operation permits transmission in both directions at the same time. True False True False ANSWER DOWNLOAD EXAMIANS APP
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