In an amplitude modulated wave for audio-frequency of 500 cycles/sec, the appropriate carrier frequency will be
50 cycles/sec
100 cycles/sec
500 cycles/sec
50,000 cycles/sec
D.
50,000 cycles/sec
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What is 'amplitude modulation'? Represent the process graphically. Write the limitation of amplitude modulation.
State various modes of propagation of electromagnetic waves. Explain briefly using a proper diagram, the mode of propagation used is the frequency range from a few MHz up to 40 MHz.
Radio waves of constant amplitude can be generated with
Filter
Rectifier
FET
Oscillator
The process of superimposing signal frequency (i.e.,) audio wave on the carrier wave is known as