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 characteristic impedance of a twin wire feeder used for TV signals is about 1000 ohm 100 ohm 500 ohm 300 ohm 1000 ohm 100 ohm 500 ohm 300 ohm 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. 4.9 5 995 10 4.9 5 995 10 ANSWER DOWNLOAD EXAMIANS APP
Communication Systems The disadvantage of FM over AM is that High output power is needed Large bandwidth is required Noise is very high for high frequency High modulating power is needed High output power is needed Large bandwidth is required Noise is very high for high frequency High modulating power is needed ANSWER DOWNLOAD EXAMIANS APP
Communication Systems Full duplex operation permits transmission in both directions at the same time. False True False True ANSWER DOWNLOAD EXAMIANS APP
Communication Systems Assertion (A): In FM the frequency of the carrier is varied by the modulating voltageReason (R): FM and PM are two forms of angle modulation. Both A and R are correct but R is not correct explanation of A A is wrong but R is correct Both A and R are correct and R is correct explanation of A A is correct but R is wrong Both A and R are correct but R is not correct explanation of A A is wrong but R is correct Both A and R are correct and R is correct explanation of A A is correct but R is wrong ANSWER DOWNLOAD EXAMIANS APP
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