Fundamentals Of Electronics And Communication Engi
Fundamentals of Electronics and Communication Engi
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Fundamentals of Electronics and Communication Engineering Exam Questions Answered Correctly (Latest Update )
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Fundamentals of Electronics and Communication Engi
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Fundamentals Of Electronics And Communication Engi
Fundamentals of Electronics and Communication Engineering Exam Questions Answered Correctly (Latest Update )
Radio Wave Propagation - Answers How radio waves travel from one place to another.
Ground Wave Propagation - Answers Radio waves travel along the surface of the Earth.
Frequency Range (...
Fundamentals of Electronics and Communication Engineering Exam Questions Answered Correctly
(Latest Update 2024-2025)
Radio Wave Propagation - Answers How radio waves travel from one place to another.
Ground Wave Propagation - Answers Radio waves travel along the surface of the Earth.
Frequency Range (Ground Wave) - Answers Works for low and medium frequencies (below 3 MHz).
Distance (Ground Wave) - Answers Short to medium distances (up to 100-300 km).
Sky Wave Propagation - Answers Radio waves go up into the atmosphere, hit the ionosphere, and
bounce back to Earth.
Frequency Range (Sky Wave) - Answers Works best with high frequencies (3 to 30 MHz).
Distance (Sky Wave) - Answers Long distances (up to thousands of kilometers).
Space Wave Propagation - Answers Waves travel in a straight line between the transmitter and the
receiver.
Frequency Range (Space Wave) - Answers Works best with very high frequencies (VHF) and ultra-high
frequencies (UHF) (above 30 MHz).
Distance (Space Wave) - Answers Line-of-sight distance (up to the horizon or further, depending on
height).
Fading - Answers The strength of the radio signal weakens or fluctuates as it travels.
Multipath Fading - Answers Signals take different paths (e.g., bouncing off buildings) and interfere with
each other.
Absorption Fading - Answers Signals are absorbed by objects like buildings, trees, or the atmosphere.
Interference Fading - Answers Other signals or noise weaken the radio wave.
Weather Fading - Answers Weather conditions like rain, fog, or humidity weaken the signal.
Ionospheric Fading - Answers Changes in the ionosphere can affect long-distance signals, especially
during the day or night.
Modulation - Answers The process of adding information (like your voice, music, or data) to a carrier
signal.
Need for Modulation - Answers Without modulation, signals like your voice would not travel far enough
because voice frequencies are too low.
, Amplitude Modulation (AM) - Answers In AM, the amplitude (strength) of the carrier signal changes
based on the information (message signal) you want to send.
Frequency Modulation (FM) - Answers In FM, the frequency (the number of waves per second) of the
carrier signal changes with the message.
Phase Modulation (PM) - Answers In PM, the phase (position) of the carrier signal changes to carry the
information.
Demodulation - Answers The reverse process of modulation where the receiver extracts the original
message from the carrier wave.
SSB-SC (Single Sideband Suppressed Carrier) - Answers Only one sideband is transmitted, and the carrier
is suppressed.
DSB-SC (Double Sideband Suppressed Carrier) - Answers Both sidebands are transmitted, but the carrier
is suppressed.
FM Transmitter Block Diagram - Answers 1. Audio Input 2. Oscillator 3. Frequency Modulator 4. Power
Amplifier 5. Antenna
FM Generation - Answers An oscillator generates the carrier wave, and the frequency of the wave is
varied in response to the input signal.
FM Detection - Answers A demodulator extracts the original message from the frequency-modulated
signal.
AM - Answers Changes in amplitude.
FM - Answers Changes in frequency.
PM - Answers Changes in phase.
Antenna - Answers A device that converts electrical energy into radio waves and vice versa.
Radiation Pattern - Answers A graphical representation of the radiation properties of the antenna as a
function of space.
Omnidirectional Antenna - Answers Radiates equally in all directions (e.g., dipole antenna).
Directional Antenna - Answers Concentrates energy in a specific direction (e.g., Yagi-Uda antenna).
Gain - Answers The measure of an antenna's ability to direct radio frequency energy in a particular
direction compared to a standard (isotropic) antenna.
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