Communication Systems If output power of a radio receiver is doubled, its volume is increased by __________ dB. 2 -3 3 1 2 -3 3 1 ANSWER DOWNLOAD EXAMIANS APP
Communication Systems Leak type bias is used in plate modulated class C amplifier to 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 Increase the bandwidth ANSWER DOWNLOAD EXAMIANS APP
Communication Systems For attenuation of high frequencies we should use Resistance Series capacitance Shunt capacitance Inductance Resistance Series capacitance Shunt capacitance Inductance ANSWER DOWNLOAD EXAMIANS APP
Communication Systems In Modulation, “carrier” is Voltage for which frequency, phase or amplitude is varied Resultant wave Voltage with constant frequency, phase or amplitude Speech voltage to be transmitted Voltage for which frequency, phase or amplitude is varied Resultant wave Voltage with constant frequency, phase or amplitude Speech voltage to be transmitted ANSWER DOWNLOAD EXAMIANS APP
Communication Systems In case of low level amplitude modulation system, the amplifiers following the modulated stage must be Class C amplifiers Linear devices Non-linear devices Harmonic devices Class C amplifiers Linear devices Non-linear devices Harmonic devices ANSWER DOWNLOAD EXAMIANS APP
Communication Systems For a plate-modulated class C amplifier the plate supply voltage is E. The maximum plate cathode voltage could be almost high as 2E 4E 6E 3E 2E 4E 6E 3E ANSWER DOWNLOAD EXAMIANS APP
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