IGCSE A Level Physics MCQs - Chapter 7
Communication Systems Multiple Choice Questions (MCQs) PDF Download - 1
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Communication Systems MCQs with Answers PDF Download: MCQ Quiz 1
As compared to sound waves the frequency of radio waves is
- lower
- higher
- equal
- may be higher or lower
Decrease in strength of signal is known as
- tuning
- modulation
- attenuation
- amplification
If frequency of modulated wave is less than frequency of carrier wave, then input signal is
- negative
- positive
- zero
- infinite
At the end of communication system, the signal is converted from radio to
- sound
- mechanical energy
- kinetic energy
- potential energy
Energy is lost in wires due to
- heating
- resistance
- conduction
- both A and B
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