Communication Systems A buffer amplifier is A high gain D.C. amplifier A double-tuned amplifier None of these A cathode follower stage A high gain D.C. amplifier A double-tuned amplifier None of these A cathode follower stage ANSWER DOWNLOAD EXAMIANS APP
Communication Systems Leak type bias is used in plate modulated class C amplifier to Prevent tuned circuit damping Increase the bandwidth Prevent over modulation Prevent excessive grid current Prevent tuned circuit damping Increase the bandwidth Prevent over modulation Prevent excessive grid current ANSWER DOWNLOAD EXAMIANS APP
Communication Systems For a low level AM system, the amplifiers modulated stage must be Harmonic devices Non-linear devices Linear devices Class C amplifiers Harmonic devices Non-linear devices Linear devices Class C amplifiers ANSWER DOWNLOAD EXAMIANS APP
Communication Systems A woofer should be fed from the input through a Low pass filter High pass filter Band stop filter Band pass filter Low pass filter High pass filter Band stop filter Band pass filter ANSWER DOWNLOAD EXAMIANS APP
Communication Systems In case of frequency modulation, modulating voltage remains constant if the modulating frequency is lowered, then Amplitude of distant sidebands decreases Amplitude of distant sidebands remains constant Amplitude of distant sidebands first increases, then decreases Amplitude of distant sidebands increases Amplitude of distant sidebands decreases Amplitude of distant sidebands remains constant Amplitude of distant sidebands first increases, then decreases Amplitude of distant sidebands increases ANSWER DOWNLOAD EXAMIANS APP
Communication Systems An FM radio receiver which is tuned to a 91.6 MHz broadcast station may receive an image frequency of __________ MHz. 70.2 113 80.9 102.3 70.2 113 80.9 102.3 ANSWER DOWNLOAD EXAMIANS APP
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