Communication Systems The modulation index of an FM is changed from 0 to 1. How does the transmitted power change? Gets doubled Gets increased by 50 percent Gets halved Remains unchanged Gets doubled Gets increased by 50 percent Gets halved Remains unchanged 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 first increases, then decreases Amplitude of distant sidebands decreases Amplitude of distant sidebands remains constant Amplitude of distant sidebands increases Amplitude of distant sidebands first increases, then decreases Amplitude of distant sidebands decreases Amplitude of distant sidebands remains constant Amplitude of distant sidebands increases ANSWER DOWNLOAD EXAMIANS APP
Communication Systems If output power of a radio receiver is doubled, its volume is increased by __________ dB. 2 1 3 -3 2 1 3 -3 ANSWER DOWNLOAD EXAMIANS APP
Communication Systems DVD uses None of these Laser beam for both recording and playback Video head for recording and laser beam for playback Laser beam for recording and video head for playback None of these Laser beam for both recording and playback Video head for recording and laser beam for playback Laser beam for recording and video head for playback ANSWER DOWNLOAD EXAMIANS APP
Communication Systems Leak type bias is used in plate modulated class C amplifier to Prevent excessive grid current Prevent over modulation Prevent tuned circuit damping Increase the bandwidth Prevent excessive grid current Prevent over modulation Prevent tuned circuit damping Increase the bandwidth ANSWER DOWNLOAD EXAMIANS APP
Communication Systems Fourier analysis indicate that a square wave can be represented as Fundamental and subharmonic sine waves A fundamental sine wave and harmonics A fundamental sine wave and even harmonics A fundamental sine wave and odd harmonics Fundamental and subharmonic sine waves A fundamental sine wave and harmonics A fundamental sine wave and even harmonics A fundamental sine wave and odd harmonics ANSWER DOWNLOAD EXAMIANS APP
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